Listado

Artículos publicados 2016

• Laterally coupled circular quantum dots under applied electric field
  ​Physica E: Low-Dimensional Systems and Nanostructures, 77, pp. 34-43.  
  Autores: Duque, C.M., Correa, J.D., Morales, A.L., Mora-Ramos, M.E., Duque, C.A.
  ​DOI: 10.1016/j.physe.2015.10.024

• Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center
  Physica B: Condensed Matter, 484, pp. 73-82.  
  Autores: Hoyos, J.H., Correa, J.D., Mora-Ramos, M.E., Duque, C.A.  
  DOI: 10.1016/j.physb.2015.12.038

• Electronic structure and optical properties of triangular GaAs/AlGaAs quantum dots: Exciton and impurity states  
  Physica B: Condensed Matter, 484, pp. 95-108.  
  Autores: Tiutiunnyk, A., Akimov, V., Tulupenko, V., Mora-Ramos, M.E., Kasapoglu, E., Ungan, F., Sökmen, I., Morales, A.L., Duque, C.A.
  DOI: 10.1016/j.physb.2015.12.045

• Absorption coefficient and relative refractive index change for a double δ-doped GaAs MIGFET-like structure: Electric and magnetic field effects  
  ​Superlattices and Microstructures, 92, pp. 166-173.  
  Autores: Martínez-Orozco, J.C., Rodríguez-Magdaleno, K.A., Suárez-López, J.R., Duque, C.A., Restrepo, R.L. 
  DOI: 10.1016/j.spmi.2016.02.034

• Electron and donor-impurity-related Raman scattering and Raman gain in triangular quantum dots under an applied electric field
  European Physical Journal B, 89 (4), art. no. 107
  Autores: Tiutiunnyk, A., Akimov, V., Tulupenko, V., Mora-Ramos, M.E., Kasapoglu, E., Morales, A.L., Duque, C.A. 
  DOI: 10.1140/epjb/e2016-70001-3

• Optical absorption and refractive index changes in a semiconductor quantum ring: Electric field and donor impurity effects
  Physica Status Solidi (B) Basic Research, 253 (4), pp. 744-754.  
  Autores: Acosta, R.E., Morales, A.L., Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1002/pssb.201552514 

• Interband emission energy in a dilute nitride quaternary semiconductor quantum dot for longer wavelength applications
  Physica E: Low-Dimensional Systems and Nanostructures, 81, pp. 102-107. 
  Autores: Mageshwari, P.U., Peter, A.J., Lee, C.W., Duque, C.A.
  DOI: 10.1016/j.physe.2016.03.005
   

Artículos publicados 2015

• A meshless scheme for the calculation of electron and hole states in laterally coupled GaAs-Ga1-xAlxAs quantum dots under applied electric field  
  ​Superlattices and Microstructures, 87, pp. 77-82.
  Autores: Londoño, M.A., Rúa, J.H., Giraldo-Gómez, J.D., Montegranario, H., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.06.026

• Combined effects of intense laser field, electric and magnetic fields on the nonlinear optical properties of the step-like quantum well
  Materials Chemistry and Physics, 154, pp. 170-175. 
  Autores: Kasapoglu, E., Duque, C.A., Mora-Ramos, M.E., Restrepo, R.L., Ungan, F., Yesilgul, U., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.matchemphys.2015.01.01

• Papers submitted to the 16th International Conference on the Physics of Light-Matter Coupling in Nanostructures, PLMCN
  Medellín, Colombia Superlattices and Microstructures, 87, pp. 1-4. 
  Autores: Nalitov, A., Kavokin, A., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.11.009

• Nonlinear optical rectification and second-harmonic generation in a semi-parabolic quantum well under intense laser field: Effects of electric and magnetic fields
  Superlattices and Microstructures, 81, pp. 26-33. 
  Autores: Ungan, F., Martínez-Orozco, J.C., Restrepo, R.L., Mora-Ramos, M.E., Kasapoglu, E., Duque, C.A.
  DOI: 10.1016/j.spmi.2015.01.016

• Shallow-impurity-related binding energy and linear optical absorption in ring-shaped quantum dots and quantum-well wires under applied electric field
  Physica Status Solidi (B) Basic Research, 252 (4), pp. 786-794. 
  ​Autores: Kohl, S.A.A., Restrepo, R.L., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1002/pssb.201451643

• Exciton-related optical properties in zinc-blende GaN/InGaN quantum wells under hydrostatic pressure
  Physica Status Solidi (B) Basic Research, 252 (4), pp. 670-677.  
  Autores: Duque, C.M., Morales, A.L., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1002/pssb.201451402

• High-pressure effects on the intersubband optical absorption coefficient and relative refractive index change in an asymmetric double δ-doped GaAs quantum well
  Physica Status Solidi (B) Basic Research, 252 (4), pp. 683-688. 
  Autores: Rodríguez-Magdaleno, K.A., Martínez-Orozco, J.C., Rodríguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1002/pssb.201451444

• On some new effects in delta-doped QWs
  Physica E: Low-Dimensional Systems and Nanostructures, 66, pp. 162-169. 
  Autores: Tulupenko, V., Duque, C.A., Demediuk, R., Belykh, V., Tiutiunnyk, A., Morales, A.L., Akimov, V., Restrepo, R.L., Mora-Ramos, M.E., Poroshin, V., Fomina, O.
  ​DOI: 10.1016/j.physe.2014.10.024

• The effects of intense laser field and applied electric and magnetic fields on optical properties of an asymmetric quantum well
  ​Physica B: Condensed Matter, 457, pp. 165-171.
  Autores: Restrepo, R.L., Ungan, F., Kasapoglu, E., Mora-Ramos, M.E., Morales, A.L., Duque, C.A. 
  DOI: 10.1016/j.physb.2014.09.041

• The phonon-polariton spectrum of one-dimensional Rudin-Shapiro photonic superlattices with uniaxial polar materials
  Superlattices and Microstructures, 87, pp. 115-119. 
  Autores: Gómez-Urrea, H.A., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.spmi.2015.05.043

• Study of electron-related intersubband optical properties in three coupled quantum wells wires with triangular transversal section
  ​Superlattices and Microstructures, 87, pp. 131-136.  
  Autores: Tiutiunnyk, A., Tulupenko, V., Akimov, V., Demediuk, R., Morales, A.L., Mora-Ramos, M.E., Radu, A., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.05.038

• Intersubband linear and nonlinear optical response of the delta-doped SiGe quantum well
  Superlattices and Microstructures, 87, pp. 125-130. 
  Autores: Duque, C.A., Akimov, V., Demediuk, R., Belykh, V., Tiutiunnyk, A., Morales, A.L., Restrepo, R.L., Mora-Ramos, M.E., Fomina, O., Tulupenko, V. 
  DOI: 10.1016/j.spmi.2015.05.039

• Donor-impurity-related second and third harmonic generation and optical absorption in GaAs-(Ga,Al)As 3D coupled quantum dot-rings under applied electric field
  Superlattices and Microstructures, 87, pp. 25-31.
  Autores: Duque, C.A., Mora-Ramos, M.E., Correa, J.D. 
  ​DOI: 10.1016/j.spmi.2015.07.037

• Electron-related Raman scattering in dilute nitride GaAs/InxGa1-xNyAs1-y cylindrically shaped quantum dots
  ​Superlattices and Microstructures, 87, pp. 83-88. 
  Autores: Duque, C.M., Morales, A.L., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.spmi.2015.06.025

• About possible THz modulator on the base of delta-doped QWs  
  Superlattices and Microstructures, 87, pp. 5-11. 
  Autores:  Duque, C.A., Akimov, V., Demediuk, R., Belykh, V., Tiutiunnyk, A., Morales, A.L., Restrepo, R.L., Nalivayko, O., Fomina, O., Mora-Ramos, M.E., Tulupenko, V.
  DOI: 10.1016/j.spmi.2015.07.048

• The polaritonic spectrum of two-dimensional photonic crystals based on uniaxial polar materials
  Superlattices and Microstructures, 87, pp. 58-63. 
  ​Autores: Gómez-Urrea, H.A., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.spmi.2015.06.034

• Optical properties of a multibarrier structure under intense laser fields  
  ​Superlattices and Microstructures, 87, pp. 109-114. 
  Autores:  Ospina, D.A., Akimov, V., Mora-Ramos, M.E., Morales, A.L., Tulupenko, V., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.05.044

• Intense laser field effects on a Woods-Saxon potential quantum well  
  ​Superlattices and Microstructures, 87, pp. 143-148. 
  Autores: Restrepo, R.L., Morales, A.L., Akimov, V., Tulupenko, V., Kasapoglu, E., Ungan, F., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.03.070

• The formation of indirect excitons in atomic layer doped systems
  Superlattices and Microstructures, 87, pp. 32-37.   
  ​Autores: Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.spmi.2015.07.033

• Electronic and thermal properties of Biphenyl molecules
  ​Superlattices and Microstructures, 87, pp. 89-96. 
  Autores: Medina, F.G., Ojeda, J.H., Duque, C.A., Laroze, D.
  DOI: 10.1016/j.spmi.2015.06.017

• Electron-related optical properties in T-shaped AlxGa1−xAs/GaAs quantum wires and dots
  ​European Physical Journal B, 88 (5), 9 p. 
  Autores:  Martínez-Orozco, J.C., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1140/epjb/e2015-60021-x

• Donor impurity states and related optical response in a lateral coupled dot-ring system under applied electric field
  ​Physica B: Condensed Matter, 472, pp. 25-33. 
  Autores: Correa, J.D., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2015.05.012

• The effects of the intense laser field on the nonlinear optical properties of a cylindrical Ga1-xAlxAs/GaAs quantum dot under applied electric field
  Physica B: Condensed Matter, 474, pp. 15-20. 
  Autores: Kasapoglu, E., Duque, C.A., Mora-Ramos, M.E., Sökmen, I. 
  DOI: 10.1016/j.physb.2015.06.004

• Non-linear optical processes involving excited subbands in laser-dressed quantum wires with triangular cross-section
  ​Physica E: Low-Dimensional Systems and Nanostructures, 72, pp. 165-177. 
  Autores: Radu, A., Duque, C.A. 
  DOI: 10.1016/j.physe.2015.05.004

• On intersubband absorption of radiation in delta-doped QWs
  ​Physica E: Low-Dimensional Systems and Nanostructures, 74, art. no. 12056, pp. 400-406. 
  Autores: Tulupenko, V., Duque, C.A., Akimov, V., Demediuk, R., Belykh, V., Tiutiunnyk, A., Morales, A.L., Restrepo, R.L., Mora-Ramos, M.E., Fomina, O. 
  DOI: 10.1016/j.physe.2015.07.034

• Refraction index modulation induced with transverse electric field in double tunnel-coupled GaAs/AlGaAs quantum wells
  Journal of Physics: Conference Series, 643 (1), art. no. 012076, . 
  Autores: Shumilov, A.A., Vinnichenko, M.Ya., Balagula, R.M., Vorobjev, L.E., Firsov, D.A., Kulagina, M.M., Vasil'Iev, A.P., Duque, C.A., Tiutiunnyk, A., Akimov, V., Restrepo, R.L., Tulupenko, V.N., Ter-Martirosyan, A.L.   
  DOI: 10.1088/1742-6596/643/1/012076

Artículos publicados 2014

• The effects of the electric and magnetic fields on the nonlinear optical properties in the step-like asymmetric quantum well
  Physica E: Low-Dimensional Systems and Nanostructures, 61, pp. 107-110. 
  ​Autores: Kasapoglu, E., Ungan, F., Duque, C.A., Yesilgul, U., Mora-Ramos, M.E., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.physe.2014.03.024

• Electromagnetic energy transport in finite photonic structures
  Optics Express, 22 (11), pp. 12760-12772.  
  Autores:  De Dios-Leyva, M., Duque, C.A., Drake-Perez, J.C.
  DOI: 10.1364/OE.22.012760

• Effect of intense high-frequency laser field on the linear and nonlinear intersubband optical absorption coefficients and refractive index changes in a parabolic quantum well under the applied electric field
  ​Journal of Luminescence, 145, pp. 379-386. 
  Autores: Yesilgul, U., Ungan, F., Sakiroglu, S., Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I.
  DOI: 10.1016/j.jlumin.2013.07.062

• Electron-related optical responses in triangular quantum dots
  ​Physica E: Low-Dimensional Systems and Nanostructures, 60, pp. 127-132.   
  Autores: Tiutiunnyk, A., Tulupenko, V., Mora-Ramos, M.E., Kasapoglu, E., Ungan, F., Sari, H., Sökmen, I., Duque, C.A.
  DOI: 10.1016/j.physe.2014.02.017

• Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1-xAlxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, and aluminum concentration
  ​Journal of Luminescence, 145, pp. 676-683. 
  Autores: Baghramyan, H.M., Barseghyan, M.G., Kirakosyan, A.A., Restrepo, R.L., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1016/j.jlumin.2013.08.061

• Impurity binding energy for δ-doped quantum well structures
  Bulletin of Materials Science, 37 (6), pp. 1347-1351.  
  Autores: Tulupenko, V., Duque, C.A., Demediuk, R., Fomina, O., Akimov, V., Belykh, V., Dmitrichenko, T., Poroshin, V.

• Donor impurity states and related optical responses in triangular quantum dots under applied electric field
  ​Superlattices and Microstructures, 73, pp. 171-184. 
  Autores: Kasapoglu, E., Ungan, F., Sari, H., Sökmen, I., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1016/j.spmi.2014.05.023

• Asymmetric GaAs n-type double δ-doped quantum wells as a source of intersubband-related nonlinear optical response: Effects of an applied electric field
  Journal of Luminescence, 147, pp. 77-84. 
  ​Autores: Rodríguez-Magdaleno, K.A., Martínez-Orozco, J.C., Rodríguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1016/j.jlumin.2013.10.057

• Linear and nonlinear optical properties in a double inverse parabolic quantum well under applied electric and magnetic fields
  Superlattices and Microstructures, 66, pp. 129-135. 
  Autores: Ungan, F., Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I.
  DOI: 10.1016/j.spmi.2013.12.006

• Nonlinear optical properties in an asymmetric double δ-doped quantum well with a Schottky barrier: Electric field effects
  Physica Status Solidi (B) Basic Research, 251 (2), pp. 415-422. 
  Autores: Rojas-Briseño, J.G., Martínez-Orozco, J.C., Rodríguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1002/pssb.201350050

• Intense laser field effects on the linear and nonlinear optical properties in a semiconductor quantum wire with triangle cross section
  Superlattices and Microstructures, 66, pp. 10-22. 
  Autores: Barseghyan, M.G., Duque, C.A., Niculescu, E.C., Radu, A. 
  DOI: 10.1016/j.spmi.2013.11.023

• Essential properties of a D2 + molecular complex confined in ring-like nanostructures under external probes: Magnetic field and hydrostatic pressure
  Superlattices and Microstructures, 67, pp. 207-220. 
  Autores: Fulla, M.R., Marín, J.H., Gutiérrez, W., Mora-Ramos, M.E., Duque, C.A.
  ​DOI: 10.1016/j.spmi.2013.12.027

• Electron-related linear and nonlinear optical responses in vertically coupled triangular quantum dots
  ​Physica B: Condensed Matter, 452, pp. 82-91.
  Autores:  Martínez-Orozco, J.C., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1016/j.physb.2014.07.003 

Artículos publicados 2013

• On the possibility of tuning the energy separation between space-quantized levels in a quantum well
  ​Philosophical Magazine Letters, 93 (1), pp. 42-49. 
  Autores: Tulupenko, V., Duque, C.A., Demedyuk, R., Belichenko, Y., Duque, C.M., Akimov, V., Poroshin, V., Fomina, O. 
  DOI: 10.1080/09500839.2012.729959

• Electron-related nonlinearities in GaAs-Ga1-xAlxAs double quantum wells under the effects of intense laser field and applied electric field
  ​Journal of Luminescence, 135, pp. 301-311. 
  Autores: Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I.
  DOI: 10.1016/j.jlumin.2012.09.025

• Electron states and related optical responses in asymmetric inverse parabolic quantum wells 
  Superlattices and Microstructures, 54 (1), pp. 61-70. 
  ​Autores: Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.spmi.2012.10.004

• Exciton-related nonlinear optical absorption and refractive index change in GaAs-Ga1-xAlxAs double quantum wells
  ​Physica B: Condensed Matter, 409 (1), pp. 78-82.   
  Autores: Miranda, G.L., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2012.10.008

• Linear and nonlinear optical absorption coefficients in GaAs/Ga 1-xAlxAs concentric double quantum rings: Effects of hydrostatic pressure and aluminum concentration
  Journal of Luminescence, 134, pp. 594-599.  
  Autores: Baghramyan, H.M., Barseghyan, M.G., Kirakosyan, A.A., Restrepo, R.L., Duque, C.A.
  DOI: 10.1016/j.jlumin.2012.07.024

• Binding energy of hydrogenic donor impurity in GaAs / Ga 1 xAlxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, temperature, and aluminum concentration
  Physica E: Low-Dimensional Systems and Nanostructures, 48, pp. 164-170. 
  Autores: Baghramyan, H.M., Barseghyan, M.G., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1016/j.physe.2012.11.012

• Properties of the second and third harmonics generation in a quantum disc with inverse square potential. A modeling for nonlinear optical responses of a quantum ring
  Journal of Luminescence, 138, pp. 53-60. 
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.jlumin.2013.01.032

• Exciton states in GaAs δ-doped systems under magnetic fields and hydrostatic pressure
  Physica B: Condensed Matter, 415, pp. 72-76. 
  Autores: Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2013.02.003

• Nonlinear optical rectification associated to exciton states in asymmetric coupled double quantum wells
  Physica E: Low-Dimensional Systems and Nanostructures, 50, pp. 108-115. 
  ​Autores: Miranda, G.L., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physe.2013.03.008

• Optical nonlinearities associated to applied electric fields in parabolic two-dimensional quantum rings
  Journal of Luminescence, 143, pp. 81-88. 
  Autores: Duque, C.M., Morales, A.L., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.jlumin.2013.04.039

• Nonlinear optical properties related to intersubband transitions in asymmetrical double δ-doped GaAs; Effects of an applied electric field
  Materials Research Society Symposium Proceedings, 1479, pp. 133-138. 
  Autores:  Rodríguez-Magdaleno, K.A., Martínez-Orozco, J.C., Rodríguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1557/opl.2012.1610

• Nonlinear absorption coefficient and relative refraction index change for an asymmetrical double delta-doped quantum well in GaAs with a Schottky barrier potential 
  Materials Research Society Symposium Proceedings, 1479, pp. 125-131.   
  ​Autores: Rojas-Briseño, J.G., Martinez-Orozco, J.C., Rodriguez-Vargas, I., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1557/opl.2012.1609

• Effects of hydrostatic pressure on the nonlinear optical properties of a donor impurity in a GaAs quantum ring
  Physica E: Low-Dimensional Systems and Nanostructures, 51, pp. 48-54. 
  Autores: Restrepo, R.L., Barseghyan, M.G., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physe.2012.09.030

• Impurity-related linear and nonlinear optical response in quantum-well wires with triangular cross section
  Journal of Luminescence, 143, pp. 304-313. 
  ​Autores: Duque, C.A., Mora-Ramos, M.E., Kasapoglu, E., Ungan, F., Yesilgul, U., Sakiroglu, S., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.jlumin.2013.04.048

• Simultaneous effects of hydrostatic pressure and temperature on the nonlinear optical properties in a parabolic quantum well under the intense laser field  
  Optics Communications, 309, pp. 158-162. 
  ​Autores: Ungan, F., Yesilgul, U., Sakiroglu, S., Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.optcom.2013.07.006

• Nonlinear absorption coefficient and relative refraction index change for an asymmetrical double o-doped quantum well in GaAs with a Schottky barrier potential
  Physica B: Condensed Matter, 424, pp. 13-19. 
  Autores: Rojas-Briseflo, J.G., MartInez-Orozco, J.C., Rodriguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A.
  DOI: 10.1016/j.physb.2013.05.004

Artículos publicados 2012

• Combined effects of intense laser field and applied electric field on exciton states in GaAs quantum wells: Transition from the single to double quantum well
  Physica Status Solidi (B) Basic Research, 249 (1), pp. 118-127.
  Autores: Duque, C.A., Mora-Ramos, M.E., Kasapoglu, E., Sari, H., Sökmen, I. 
  DOI: 10.1002/pssb.201147250

• Hydrostatic pressure and electric and magnetic field effects on the binding energy of a hydrogenic donor impurity in InAs Pöschl-Teller quantum ring
  Superlattices and Microstructures, 51 (1), pp. 119-127.   
  ​Autores: Barseghyan, M.G., Hakimyfard, A., Kirakosyan, A.A., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.spmi.2011.11.005

• The nonlinear optical absorption and corrections to the refractive index in a GaAs n-type delta-doped field effect transistor under hydrostatic pressure
  Physica Status Solidi (B) Basic Research, 249 (1), pp. 146-152. 
  ​Autores: Martínez-Orozco, J.C., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1002/pssb.201147301

• Nonlinear optical rectification and second and third harmonic generation in GaAs δ-FET systems under hydrostatic pressure
  Journal of Luminescence, 132 (2), pp. 449-456.   
  ​Autores: Martínez-Orozco, J.C., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.jlumin.2011.09.022

• Linear and nonlinear optical properties in a semiconductor quantum well under intense laser radiation: Effects of applied electromagnetic fields
  ​Journal of Luminescence, 132 (4), pp. 901-913.
  Autores: Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.jlumin.2011.11.008

• Binding energy of a donor impurity in GaAs δ-doped systems under electric and magnetic fields, and hydrostatic pressure
  Physica E: Low-Dimensional Systems and Nanostructures, 44 (7-8), pp. 1335-1341. 
  Autores: Mora-Ramos, M.E., Gaggero-Sager, L.M., Duque, C.A. 
  DOI: 10.1016/j.physe.2012.02.014

• Effects of hydrostatic pressure, temperature, electric field and aluminum concentration on the electronic states in GaAs/Ga 1-xAl xAs concentric double quantum rings
  Journal of Physics: Conference Series, 350 (1), art. no. 12016,
  Autores: Baghramyan, H.M., Barseghyan, M.G., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1088/1742-6596/350/1/012016

• Nonlinear optical rectification and the second and third harmonic generation in Pöschl-Teller quantum well under the intense laser field
  Physics Letters, Section A: General, Atomic and Solid State Physics, 376 (23), pp. 1875-1880.   
  ​Autores: Şakiroǧlu, S., Ungan, F., Yesilgul, U., Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I.I. 
  DOI: 10.1016/j.physleta.2012.04.028

• Electronic band structure of GaAs/Al xGa 1-xAs superlattice in an intense laser field
  Journal of Luminescence, 132 (6), pp. 1584-1588. 
  Autores: Sakiroglu, S., Yesilgul, U., Ungan, F., Duque, C.A., Kasapoglu, E., Sari, H., Sokmen, I. 
  DOI: 10.1016/j.jlumin.2012.01.060

• Electric field effects on excitons in cylindrical quantum dots with asymmetric axial potential. Influence on the nonlinear optical properties
  Physica E: Low-Dimensional Systems and Nanostructures, 44 (9), pp. 1936-1944. 
  Autores: Acosta, R.E., Zapata, A., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.physe.2012.05.027

• Hydrostatic pressure and electric field effect on electronic states in double quantum rings
  Proceedings of SPIE - The International Society for Optical Engineering, 8414, art. no. 84140C.
  Autores: Baghramyan, H.M., Barseghyan, M.G., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1117/12.923304

• Excitons in cylindrical GaAs-Ga 1-xAl xAs quantum dots under applied electric field
  Physica B: Condensed Matter, 407 (12), pp. 2351-2357. 
  ​Autores: Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2012.03.036

• Quantum disc plus inverse square potential. An analytical model for two-dimensional quantum rings: Study of nonlinear optical properties
  Annalen der Physik, 524 (6-7), pp. 327-337. 
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1002/andp.201200055

• Nonlinear optical absorption and optical rectification in near-surface double quantum wells: Combined effects of electric, magnetic fields and hydrostatic pressure
  Optical and Quantum Electronics, 44 (6-7), pp. 355-372. 
  ​Autores: López, S.Y., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1007/s11082-012-9544-5

• The two-dimensional square and triangular photonic lattice under the effects of magnetic field, hydrostatic pressure, and temperature
  Optical and Quantum Electronics, 44 (8-9), pp. 375-392. 
  Autores: Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1007/s11082-012-9545-4

• Study of direct and indirect exciton states in GaAs-Ga1-xAlxAs quantum dots under the effects of intense laser field and applied electric field
  European Physical Journal B, 85 (9), art. no. 312.
  ​Autores: Mora-Ramos, M.E., Duque, C.A., Kasapoglu, E., Sari, H., Sökmen, I. 
  DOI: 10.1140/epjb/e2012-30148-5

• Exciton properties in zincblende InGaN-GaN quantum wells under the effects of intense laser fields
  Nanoscale Research Letters, 7, art. no. 492. 
  Autores:  Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1186/1556-276X-7-492

• Exciton-related energies of the 1s-like states of excitons in GaAs-Ga 1-xAl xAs double quantum wells
  Journal of Luminescence, 132 (10), pp. 2525-2530.
  Autores: Miranda, G.L., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.jlumin.2012.05.015

• Tilted electric field effects on the electronic states in a GaAs quantum disk
  Superlattices and Microstructures, 52 (6), pp. 1078-1082.  
  Autores: Duque, C.M., Restrepo, R.L., Duque, C.A. 
  DOI: 10.1016/j.spmi.2012.08.005

• Pressure and temperature effects on the third-order nonlinear optical properties in GaAs quantum dots
  Physica B: Condensed Matter, 407 (24), pp. 4773-4776. 
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2012.08.026

• Exciton-related nonlinear optical properties in cylindrical quantum dots with asymmetric axial potential: Combined effects of hydrostatic pressure, intense laser field, and applied electric field
  Nanoscale Research Letters, 7. 
  Autores: Zapata, A., Acosta, R.E., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1186/1556-276X-7-508

• Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: Effects of applied electric field and hydrostatic pressure
  Nanoscale Research Letters, 7. 
  Autores: Barseghyan, M.G., Restrepo, R.L., Mora-Ramos, M.E., Kirakosyan, A.A., Duque, C.A. 
  DOI: 10.1186/1556-276X-7-538

Artículos publicados 2011

• Intense laser effects on nonlinear optical absorption and optical rectification in single quantum wells under applied electric and magnetic field
  Applied Surface Science, 257 (6), pp. 2313-2319.
  Autores: Duque, C.A., Kasapoglu, E., Akiroglu, S., Sari, H., Sökmen, I.
  DOI: 10.1016/j.apsusc.2010.09.095

• Effects of hydrostatic pressure and electric field on the nonlinear optical rectification of strongly confined electronhole pairs in GaAs quantum dots
  Physica E: Low-Dimensional Systems and Nanostructures, 43 (4), pp. 1002-1006. 
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physe.2010.12.001

• Simultaneous effects of hydrostatic pressure and electric field on impurity binding energy and polarizability in coupled InAs/GaAs quantum wires
  Physica B: Condensed Matter, 406 (4), pp. 952-956.
  Autores: Tangarife, E., Duque, C.A. 
  DOI: 10.1016/j.physb.2010.12.035

• Combined effects of electric field and hydrostatic pressure on electron states in asymmetric GaAs/(Ga, Al) triple quantum dots
  Superlattices and Microstructures, 49 (3), pp. 269-274. 
  Autores:  Miranda, G.L., Restrepo, R.L., Duque, C.A. 
  DOI: 10.1016/j.spmi.2010.08.003

• The effects of the intense laser field on bound states in Ga x In 1- x N y As 1- y N/GaAs single quantum well
  European Physical Journal B, 80 (1), pp. 89-93. 
  Autores: Ungan, F., Kasapoglu, E., Duque, C.A., Yesilgul, U., Şakiroglu, S., Sökmen, I. 
  DOI: 10.1140/epjb/e2011-10902-y

• Optical properties of hybrid periodic/quasiregular dielectric multilayers
  Superlattices and Microstructures, 49 (3), pp. 203-208. 
  Autores: Escorcia-García, J., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.spmi.2010.08.006

• Hydrostatic pressure and electric field effects and nonlinear optical rectification of confined excitons in spherical quantum dots
  Superlattices and Microstructures, 49 (3), pp. 264-268.   
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.spmi.2010.06.008

• Donor impurity states in coupled quantum well wires under hydrostatic pressure and applied electric field
  Superlattices and Microstructures, 49 (3), pp. 275-278. 
  Autores: Tangarife, E., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.spmi.2010.05.004

• Binding energy and photoionization cross section of hydrogen-like donor impurity in cylindrical InAs Pöschl-Teller quantum layer in magnetic field
  Proceedings of SPIE - The International Society for Optical Engineering, 7998, art. no. 79981G.
  Autores:  Barseghyan, M.G., Hakimyfard, A., Zuhair, M., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1117/12.891049

• Simultaneous effects of hydrostatic pressure and applied electric field on the impurity-related self-polarization in GaAs/Ga1-xAlxAs multiple quantum wells
  Journal of Luminescence, 131 (5), pp. 1016-1021.  
  Autores: Restrepo, R.L., Miranda, G.L., Duque, C.A., Mora-Ramos, M.E. 
  DOI: 10.1016/j.jlumin.2011.01.014

• Nonlinear optical rectification and optical absorption in GaAsGa 1-xAlxAs double quantum wells under applied electric and magnetic fields
  Physica E: Low-Dimensional Systems and Nanostructures, 43 (7), pp. 1405-1410.   
  Autores: Karabulut, Í., Duque, C.A. 
  DOI: 10.1016/j.physe.2011.03.013

• The effects of the intense laser field on donor impurities in a cylindrical GaxIn1-x NyAs1-y/GaAs quantum dot under the electric field 
  Physica E: Low-Dimensional Systems and Nanostructures, 43 (8), pp. 1427-1432. 
  Autores: Kasapoglu, E., Duque, C.A., Şakiroǧlu, S., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.physe.2011.03.016

• Excitons in a cylindrical GaAs Pöschl-Teller quantum dot
  Physica Status Solidi (B) Basic Research, 248 (6), pp. 1412-1419.  
  ​Autores: Mora-Ramos, M.E., Barseghyan, M.G., Duque, C.A. 
  DOI: 10.1002/pssb.201046428

• Intense laser field effect on impurity states in a semiconductor quantum well: Transition from the single to double quantum well potential
  European Physical Journal B, 81 (4), pp. 441-449. 
  ​Autores: Duque, C.A., Mora-Ramos, M.E., Kasapoglu, E., Sari, H., Sökmen, I. 
  DOI: 10.1140/epjb/e2011-20265-0

• Nonlinear optical rectification and optical absorption in GaAsGa 1xAlxAs asymmetric double quantum wells: Combined effects of applied electric and magnetic fields and hydrostatic pressure
  Journal of Luminescence, 131 (7), pp. 1502-1509. 
  Autores: Karabulut, I., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.jlumin.2011.03.044

• Intense laser field effects on the linear and nonlinear intersubband optical properties of a semi-parabolic quantum well
  European Physical Journal B, 82 (1), pp. 13-17.  
  Autores: Kasapoglu, E., Duque, C.A., Sari, H., Sökmen, I. 
  DOI: 10.1140/epjb/e2011-20243-6

• Barseghyan, M.G. Electronic states in a Pöschl-Teller-like quantum well: Combined effects of electric field, hydrostatic pressure, and temperature
  Superlattices and Microstructures, 50 (5), pp. 480-490.  
  ​Autores: Duque, C.A., Mora-Ramos, M.E., 
  DOI: 10.1016/j.spmi.2011.08.010

• Hydrostatic pressure, impurity position and electric and magnetic field effects on the binding energy and photo-ionization cross section of a hydrogenic donor impurity in an InAs Pöschl-Teller quantum ring
  European Physical Journal B, 84 (2), pp. 265-271.
  ​Autores: Barseghyan, M.G., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1140/epjb/e2011-20650-7

• Simultaneous effects of electron-hole correlation, hydrostatic pressure, and temperature on the third harmonic generation in parabolic GaAs quantum dots 
  Journal of Nanoparticle Research, 13 (11), pp. 6103-6112. 
  Autores: Duque, C.M., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1007/s11051-011-0348-5

• Binding energy of hydrogen-like donor impurity and photoionization cross-section in InAs Pöschl-Teller quantum ring under applied magnetic field
  Physica E: Low-Dimensional Systems and Nanostructures, 44 (2), pp. 419-424.  
  Autores: Barseghyan, M.G., Hakimyfard, A., Zuhair, M., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1016/j.physe.2011.09.013

• The effect of the intense laser field on the intersubband transitions in Ga1-xInxNyAs1-y/GaAs single quantum well
  Physica E: Low-Dimensional Systems and Nanostructures, 44 (2), pp. 515-520.   
  Autores: Ungan, F., Kasapoglu, E., Duque, C.A., Sari, H., Sokmen, I. 
  DOI: 10.1016/j.physe.2011.10.002

• Modelling turbulent skin-friction control using linearised Navier-Stokes equations
  Journal of Physics: Conference Series, 318 (SECTION 4), art. no. 042026.
  Autores: Duque, C.A., Baig, M.F., Lockerby, D.A., Chernyshenko, S.I., Davies, C. 
  DOI: 10.1088/1742-6596/318/4/042026

Artículos publicados 2010

• Calculation of direct and indirect excitons in GaAs-Ga1-xAlxAs coupled double quantum wells: Electric and magnetic fields and hydrostatic pressure effects
  Solid State Sciences, 12 (2), pp. 210-221.  
  ​Autores: López, S.Y., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.solidstatesciences.2009.04.025

• Donor impurity in vertically-coupled quantum-dots under hydrostatic pressure and applied electric field
  European Physical Journal B, 73 (3), pp. 309-319.  
  Autores: Duque, C.M., Barseghyan, M.G., Duque, C.A. 
  DOI: 10.1140/epjb/e2009-00433-7

• Simultaneous effects of hydrostatic pressure and temperature on donor binding energy and photoionization cross section in Pöschl-Teller quantum well
  Physica E: Low-Dimensional Systems and Nanostructures, 42 (5), pp. 1618-1622. 
  ​Autores: Barseghyan, M.G., Hakimyfard, A., López, S.Y., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1016/j.physe.2010.01.008

• Temperature and hydrostatic pressure effects on the photonic band structure of a 2D honeycomb lattice
  Physica E: Low-Dimensional Systems and Nanostructures, 42 (6), pp. 1865-1869.  
  Autores: Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1016/j.physe.2010.02.016

• Shallow-donor impurity in coupled GaAs/Ga1-xAlxAs quantum well wires: Hydrostatic pressure and applied electric field effects
  Physica Status Solidi (B) Basic Research, 247 (7), pp. 1778-1785.  
  ​Autores: Tangarife, E., Duque, C.A. 
  DOI: 10.1002/pssb.200945519

• Electronic states in double quantum well-wires with potential W-profile: Combined effects of hydrostatic pressure and electric field 
  Journal of Materials Science, 45 (18), pp. 5045-5053.  
  ​Autores: Restrepo, R.L., Miranda, G.L., Duque, C.A. 
  DOI: 10.1007/s10853-010-4334-6

• Combined effects of hydrostatic pressure and electric field on the donor binding energy and polarizability in laterally coupled double InAs/GaAs quantum-well wires
  Applied Surface Science, 256 (23), pp. 7234-7241.  
  ​Autores: Tangarife, E., Duque, C.A. 
  DOI: 10.1016/j.apsusc.2010.05.057

• Intense laser effects on donor impurity in a cylindrical single and vertically coupled quantum dots under combined effects of hydrostatic pressure and applied electric field
  Applied Surface Science, 256 (24), pp. 7406-7413.   
  Autores: Duque, C.A., Kasapoglu, E., Sakiroglu, S., Sari, H., Sökmen, I. 
  DOI: 10.1016/j.apsusc.2010.05.081

• Hydrostatic pressure, temperature and electric field effects on donor binding energy in Pöschl-Teller quantum well
  Physica E: Low-Dimensional Systems and Nanostructures, 43 (1), pp. 529-533. 
  Autores: Barseghyan, M.G., Hakimyfard, A., Lpez, S.Y., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.1016/j.physe.2010.09.006

• Excitons in cylindrical GaAs PöschlTeller quantum dots: Hydrostatic pressure and temperature effects
  Physica E: Low-Dimensional Systems and Nanostructures, 43 (1), pp. 338-344. 
  Autores: Mora-Ramos, M.E., Barseghyan, M.G., Duque, C.A.
  DOI: 10.1016/j.physe.2010.08.007

• Influence of electric field, hydrostatic pressure and temperature on the electronic states in a Pöschl-Teller quantum well
  Journal of Contemporary Physics, 45 (6), pp. 258-261.  
  Autores: Hakimyfard, A., Barseghyan, M.G., Duque, C.A., Kirakosyan, A.A. 
  DOI: 10.3103/S1068337210060022

Artículos publicados 2009

• Photonic band structure evolution of a honeycomb lattice in the presence of an external magnetic field
  Journal of Applied Physics, 105 (3), art. no. 034303.
  Autores:   Duque, C.A., Porras-Montenegro, N., Cavalcanti, S.B., Oliveira, L.E.
  DOI: 10.1063/1.3072668

• Excitons in coupled quantum dots: Hydrostatic pressure and electric field effects
  Physica Status Solidi (B) Basic Research, 246 (3), pp. 630-634.  
  Autores: López, S.Y., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1002/pssb.200880536

• Hydrostatic pressure,electric and magnetic field effects on shallow donor impurity states and photoionization cross section in cylindrical GaAs-Ga1-xAlxAs quantum dots
  Physica Status Solidi (B) Basic Research, 246 (3), pp. 626-629. 
  Autores: Barseghyan, M.G., Kirakosyan, A.A., Duque, C.A. 
  DOI: 10.1002/pssb.200880516

• Study of the electronic properties of GaAs-based atomic layer doped field effect transistor (ALD-FET) under the influence of hydrostatic pressure
  Physica Status Solidi (B) Basic Research, 246 (3), pp. 581-585. 
  Autores: Martínez-Orozco, J.C., Rodríguez-Vargas, I., Duque, C.A., Mora-Ramos, M.E., Gaggero-Sager, L.M. 
  DOI: 10.1002/pssb.200880530

• Effects of hydrostatic pressure on the conduction-electron g-factor in GaAs-Ga1-xAlxAs quantum wells
  Physica Status Solidi (B) Basic Research, 246 (3), pp. 648-651. 
  Autores: Porras-Montenegro, N., Raigoza, N., Reyes-Gómez, E., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1002/pssb.200880505

• Optical transition in self-assembled InAs/GaAs quantum lens under high hydrostatic pressure
  Journal of Applied Physics, 105 (4), art. no. 044308. 
  Autores: Rodríguez, A.H., Trallero-Giner, C., Duque, C.A., Vázquez, G.J. 
  DOI: 10.1063/1.3078109

• Impurity-related polarizability and photoionization-cross section in GaAs-Ga1 - x Alx As double quantum wells under electric fields and hydrostatic pressure
  Superlattices and Microstructures, 45 (6), pp. 590-597. 
  ​Autores: Morales, A.L., Raigoza, N., Reyes-Gómez, E., Osorio-Guillén, J.M., Duque, C.A. 
  DOI: 10.1016/j.spmi.2009.03.001

• Hydrostatic-pressure-induced Γ-X mixing in delta-doped Al xGa1-xAs
  Journal of Physics: Conference Series, 167, art. no. 012030.
  Autores: Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1088/1742-6596/167/1/012030

• Herramienta computacional interactiva para el diseño óptimo de resortes helicoidales de tracción 
  Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia, 32 (2), pp. 98-108.
  ​Autores: Galeano, C.H., Duque, C.A., Tovar, A.

• A theoretical study of exciton energy levels in laterally coupled quantum dots
  Journal of Physics Condensed Matter, 21 (40), art. no. 405801.
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/21/40/405801

• Donor-impurity related binding energy and photoinization cross-section in quantum dots: Electric and magnetic fields and hydrostatic pressure effects
  European Physical Journal B, 72 (4), pp. 521-529.   
  Autores: Barseghyan, M.G., Kirakosyan, A.A., Duque, C.A. 
  DOI: 10.1140/epjb/e2009-00391-0

• Simultaneous effects of pressure and temperature on donor binding energy in Pöschl-Teller quantum well
  Physica B: Condensed Matter, 404 (23-24), pp. 5159-5162. 
  ​Autores: Hakimyfard, A., Barseghyan, M.G., Duque, C.A., Kirakosyan, A.A.
  DOI: 10.1016/j.physb.2009.08.293

• Hydrogenic impurity binding energy in vertically coupled Ga1 - x Alx As quantum-dots under hydrostatic pressure and applied electric field
  Physica B: Condensed Matter, 404 (23-24), pp. 5177-5180.   
  ​Autores:Duque, C.M., Barseghyan, M.G., Duque, C.A. 
  DOI: 10.1016/j.physb.2009.08.292

• Photoluminescence energy transitions in GaAs - Ga1 - x Alx As double quantum wells: Electric and magnetic fields and hydrostatic pressure effects
  Physica B: Condensed Matter, 404 (23-24), pp. 5181-5184. 
  ​Autores: López, S.Y., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.physb.2009.08.291
   

• Hydrogenic donor impurity in parallel-triangular quantum wires: Hydrostatic pressure and applied electric field effects
  Physica B: Condensed Matter, 404 (23-24), pp. 5163-5166.  
  Autores: Restrepo, R.L., Giraldo, E., Miranda, G.L., Ospina, W., Duque, C.A. 
  DOI: 10.1016/j.physb.2009.08.282 

Artículos publicados 2008

• Tilted electric-field and hydrostatic pressure effects on donor impurity states in cylindrical GaAs quantum disks
  Physica E: Low-Dimensional Systems and Nanostructures, 40 (5), pp. 1383-1385.   
  Autores:López, S.Y., Porras-Montenegro, N., Tangarife, E., Duque, C.A.
  DOI: 10.1016/j.physe.2007.09.021

• Effects of hydrostatic pressure and crossed electric and magnetic fields on shallow-donor states in GaAs / Ga1 - x Alx As quantum wells
  Microelectronics Journal, 39 (3-4), pp. 431-434.  
  ​Autores:Tangarife, E., López, S.Y., de Dios-Leyva, M., Oliveira, L.E., Duque, C.A. 
  DOI: 10.1016/j.mejo.2007.07.021

• A variational method for the description of the pressure-induced Γ - X mixing in GaAs-based quantum wells
  Physica E: Low-Dimensional Systems and Nanostructures, 40 (5), pp. 1212-1213. 
  ​Autores: Mora-Ramos, M.E., López, S.Y., Duque, C.A. 
  DOI: 10.1016/j.physe.2007.08.035

• Implementation of a bus with natural gas articulated motor in Colombia's massive transportation system: A technical study
  Revista Facultad de Ingenieria, (43), pp. 18-32.
  Autores: González, J.M.M., Galeano, C., Acevedo, H., Duque, C.A. 

• Influence of the hydrostatic pressure onto the electronic and transport properties of n-type double δ-doped GaAs quantum wells 
  Microelectronics Journal, 39 (3-4), pp. 438-441. 
  Autores: Rodriguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.mejo.2007.07.022

• Energy states in GaAs delta-doped field effect transistors under hydrostatic pressure
  Microelectronics Journal, 39 (3-4), pp. 648-650. 
  ​Autores: Martínez-Orozco, J.C., Rodríguez-Vargas, I., Mora-Ramos, M.E., Duque, C.A. 
  DOI: 10.1016/j.mejo.2007.07.055

• Direct and indirect exciton states in GaAs-(Ga, Al)As double quantum wells under crossed electric and magnetic fields 
  Microelectronics Journal, 39 (3-4), pp. 398-401.
  Autores: Oliveira, L.E., de Dios-Leyva, M., Duque, C.A. 
  DOI: 10.1016/j.mejo.2007.07.064

• Magnetoexciton states and diamagnetic shifts in GaAs - Ga1 - x Alx As quantum dots/ultrathin quantum wells under growth-direction magnetic fields
  Microelectronics Journal, 39 (3-4), pp. 348-350.
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1016/j.mejo.2007.07.011

• Exciton diamagnetic shift in GaAs / Ga1 - x Alx As quantum wells under in-plane magnetic fields
  Microelectronics Journal, 39 (3-4), pp. 407-410.
  Autores:Duque, C.A., de Dios-Leyva, M., Oliveira, L.E. 
  DOI: 10.1016/j.mejo.2007.07.014

• Effects of growth-direction electric and magnetic fields on excitons in GaAs- Ga1-x Alx As coupled double quantum wells
  Physical Review B - Condensed Matter and Materials Physics, 77 (11), art. no. 113309.
  Autores: Morales, A.L., Raigoza, N., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1103/PhysRevB.77.113309

• Γ - XX mixing in GaAs-G a1-xA lxAs quantum wells under hydrostatic pressure
  European Physical Journal B, 62 (3), pp. 257-261. 
  ​Autores: Mora-Ramos, M.E., López, S.Y., Duque, C.A. 
  DOI: 10.1140/epjb/e2008-00161-6

• Hydrostatic pressure effects on the binding and transition energies for Wannier excitons in GaAs / Ga1 - x Alx As quantum wells 
  Microelectronics Journal, 39 (11), pp. 1261-1263.   
  Autores: Aristizábal, P., Restrepo, R.L., Ospina, W., Duque, C.A.
  DOI: 10.1016/j.mejo.2008.01.009

• Effects of hydrostatic pressure on the electron parallel factor and g || factor anisotropy in GaAs-(Ga, Al)As antum wells under magnetic fields
  Journal of Physics Condensed Matter, 20 (46), art. no. 465220. 
  Autores: Porras-Montenegro, N., Duque, C.A., Reyes-Gómez, E., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/20/46/465220

• A 2D honeycomb photonic crystal under applied magnetic fields
  Proceedings of SPIE - The International Society for Optical Engineering, 7138, art. no. 713819. 
  Autores: Duque, C.A., Porras-Montenegro, N., Cavalcanti, S.B., Oliveira, L.E. 
  DOI: 10.1117/12.818013

• Effects of hydrostatic pressure on the Coulomb-bound states in GaAs-Ga1-xAlxAs semiconductor superlattices
  Superlattices and Microstructures, 44 (6), pp. 809-813. 
  Autores: Vargas, J., Raigoza, N., Morales, A.L., Duque, C.A., Reyes-Gómez, E. 
  DOI: 10.1016/j.spmi.2008.09.009 

Artículos publicados 2007

• Impurity-related optical properties in rectangular-transverse section GaAs-Ga1-xAlxAs quantum well wires: Hydrostatic pressure and electric field effects
  Physica Status Solidi (B) Basic Research, 244 (1), pp. 70-75. 
  ​Autores: González, J.W., López, S.Y., Rodríguez, A.H., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1002/pssb.200672538

• Effect of applied hydrostatic pressure on the e-h ground transition in self-assembled InAs/GaAs quantum lens
  Physica Status Solidi (B) Basic Research, 244 (1), pp. 48-52. 
  Autores:Rodríguez, A.H., Duque, C.A., Trallero-Giner, C., Vázquez, G.J., Del Castillo-Mussot, M., Porras-Montenegro, N. 
  DOI: 10.1002/pssb.200672509

• Effects of crossed electric and magnetic fields on the electronic and excitonic states in bulk GaAs and GaAs Ga1-x Alx As quantum wells
  Physical Review B - Condensed Matter and Materials Physics, 75 (3), art. no. 035303.
  Autores: De Dios-Leyva, M., Duque, C.A., Oliveira, L.E.
  DOI: 10.1103/PhysRevB.75.035303

• Energy spectra of exciton states in disk-shaped GaAs-Ga 1-xAl xAs quantum dots under growth-direction magnetic fields
  European Physical Journal B, 56 (4), pp. 303-309.  
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1140/epjb/e2007-00136-1

• Exciton diamagnetic shifts in GaAs-Ga1-xAlxAs quantum dots and ultrathin quantum wells
  Journal of Physics Condensed Matter, 19 (21), art. no. 216224.
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/19/21/216224

• Hydrostatic pressure effects on the Γ-X conduction band mixing and the binding energy of a donor impurity in GaAs-Ga1-xAlxAs quantum wells
  Physica Status Solidi (B) Basic Research, 244 (6), pp. 1964-1970.   
  Autores: Duque, C.A., López, S.Y., Mora-Ramos, M.E. 
  DOI: 10.1002/pssb.200642377

• Hydrostatic pressure and growth-direction magnetic field effects on the exciton states in coupled GaAs-(Ga, Al)As quantum wells  
  Journal of Physics Condensed Matter, 19 (25), art. no. 256202.
  ​Autores: Raigoza, N., Reyes-Gómez, E., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/19/25/256202

• Calculation of direct and indirect excitons in GaAs Ga1-x Alx As coupled double quantum wells: The effects of in-plane magnetic fields and growth-direction electric fields
  Physical Review B - Condensed Matter and Materials Physics, 76 (7), art. no. 075303.
  Autores: De Dios-Leyva, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1103/PhysRevB.76.075303

• Positron annihilation in structural vacancies in Al-rich NiAl alloys
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (10), pp. 3534-3537.   
  ​Autores.Morales, A.L., Leon, L.A., Raigoza, N., Duque, C.A., Kuriplach, J., Hou, M. 
  DOI: 10.1002/pssc.200675830

• Donor impurity-related optical absorption spectra in GaAs-Ga 1-xAlxAs quantum wells: Hydrostatic pressure and Γ - X conduction band mixing effects
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (2), pp. 418-420. 
  ​Autores: Mora-Ramos, M.E., López, S.Y., Duque, C.A., Velasco, V.R. 
  DOI: 10.1002/pssc.200673257

• Acceptor and donor impurity-related optical absorption spectra in double quantum wells: Electric field and hydrostatic pressure effects 
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (2), pp. 295-297. 
  ​Autores: Morales, A.L., Raigoza, N., Duque, C.A. 
  DOI: 10.1002/pssc.200673258

• Hole subband structure in single and double p-type δ-doped diamond quantum wells
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (2), pp. 415-417. 
  Autores:Rodríguez-Vargas, I., Duque, C.A., Mora-Ramos, M.E., Velasco, V.R. 
  DOI: 10.1002/pssc.200673256

• Excited states and spontaneous transition lifetimes of donor impurities in quantum dots
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (2), pp. 360-362. 
  Autores: Murillo, G., Arce, J.C., Duque, C.A., Porras-Montenegro, N. 
  DOI: 10.1002/pssc.200673317

• Comparative study of the hydrostatic pressure and temperature effects on the impurity-related optical properties in single and double GaAs-Ga 1-xAlxAs quantum wells
  Physica Status Solidi (C) Current Topics in Solid State Physics, 4 (2), pp. 298-300.  
  Autores:Oyoko, H.O., Porras-Montenegro, N., López, S.Y., Duque, C.A. 
  DOI: 10.1002/pssc.200673259

Artículos publicados 2006

• Correlated electron-hole transition energies in quantum-well wires: Effects of hydrostatic pressure
  Physica B: Condensed Matter, 371 (1), pp. 153-157.   
  Autores: Raigoza, N., Duque, C.A., Porras-Montenegro, N., Oliveira, L.E. 
  DOI: 10.1016/j.physb.2005.10.096

• Effects of applied magnetic fields and hydrostatic pressure on the optical transitions in self-assembled InAs/GaAs quantum dots 
  Journal of Physics Condensed Matter, 18 (6), pp. 1877-1884.  
  Autores: Duque, C.A., Porras-Montenegro, N., Barticevic, Z., Pacheco, M., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/18/6/005

• Vacancy-solute complexes and their clusters in iron
  Applied Surface Science, 252 (9), pp. 3303-3308. 
  Autores: Kuriplach, J., Melikhova, O., Domain, C., Becquart, C.S., Kulikov, D., Malerba, L., Hou, M., Almazouzi, A., Duque, C.A., Morales, A.L. 
  ​DOI: 10.1016/j.apsusc.2005.08.075

• Hydrostatic-pressure effects on the correlated electron-hole transition energies in GaAs-Ga1-xAlxAs semiconductor quantum wells
  Physica Status Solidi (B) Basic Research, 243 (3), pp. 635-640. 
  ​Autores: Raigoza, N., Duque, C.A., Reyes-Gómez, E., Oliveira, L.E. 
  DOI: 10.1002/pssb.200541303

• Binding energy and photoionization cross-section in GaAs quantum well-wires and quantum dots: Magnetic field and hydrostatic pressure effects  
  Brazilian Journal of Physics, 36 (2 A), pp. 387-390.  
  ​Autores:Correa, J.D., Porras-Montenegro, N., Duque, C.A. 

• Infinite potential barrier and hydrostatic pressure effects on impurity-related optical absorption spectra in GaAs double quantum wells
  Brazilian Journal of Physics, 36 (2 A), pp. 350-353.
  Autores: Raigoza, N., Morales, A.L., Duque, C.A.

• Hydrostatic pressure and electric-field effects on the shallow donor impurity states in GaAs-Ga0.7Al0.3As quantum-well wires
  ​Brazilian Journal of Physics, 36 (3 B), pp. 944-947.  
  Autores: González, J.W., Porras-Montenegro, N., Duque, C.A.

• Donor-related optical absorption spectra for a GaAs - Ga 0.7Al0.3As double quantum well under hydrostatic pressure and applied electric field effects  
  Brazilian Journal of Physics, 36 (3 B), pp. 862-865.  
  Autores:Morales, A.L., Raigoza, N., Duque, C.A.

• Correlated electron-hole transitions in bulk GaAs and GaAs-(Ga,Al)As quantum wells: Effects of applied electric and in-plane magnetic fields
  Brazilian Journal of Physics, 36 (3 B), pp. 1038-1041.  
  Autores: Duque, C.A., Oliveira, L.E., De Dios-Leyva, M. 

• Electronic states in n-type GaAs delta-doped quantum wells under hydrostatic pressure
  Brazilian Journal of Physics, 36 (3 B), pp. 866-868.  
  Autores: Mora-Ramos, M.E., Duque, C.A. 

• Refractómetro de cubeta de sección cuadrada
  Revista Mexicana de Fisica E, 52 (2), pp. 177-181. 
  Autores: Duque, M.F.D., Gómez, S.P., Pinilla, C.C.C., Duque, C.A.D. 

Artículos publicados 2005

• Electron-hole transitions in self-assembled InAs/GaAs quantum dots: Effects of applied magnetic fields and hydrostatic pressure 
  Microelectronics Journal, 36 (3-6), pp. 231-233.
  ​Autores: Duque, C.A., Porras-Montenegro, N., Barticevic, Z., Pacheco, M., Oliveira, L.E. 
  DOI: 10.1016/j.mejo.2005.04.001

• Hydrostatic pressure effects on donor-related absorption spectra in GaAs-Ga1-xAlxAs quantum wells
  Physica B: Condensed Matter, 362 (1-4), pp. 41-49. 
  Autores: López, S.Y., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1016/j.physb.2005.01.473

• Effects of hydrostatic pressure on donor states in symmetrical GaAs-Ga 0.7Al0.3As double quantum wells
  Physica B: Condensed Matter, 363 (1-4), pp. 262-270. 
  Autores: Raigoza, N., Morales, A.L., Duque, C.A. 
  DOI: 10.1016/j.physb.2005.03.031

• Effects of hydrostatic pressure and applied electric fields on the exciton states in GaAs - (Ga,Al)As quantum wells
  Physica B: Condensed Matter, 367 (1-4), pp. 267-274.  
  ​Autores: Raigoza, N., Duque, C.A., Reyes-Gómez, E., Oliveira, L.E. 
  DOI: 10.1016/j.physb.2005.06.027

Artículos publicados 2004

• Stress effects on shallow-donor impurity states in symmetrical GaAs/Al xGa1-xAs double quantum wells  
  Physical Review B - Condensed Matter and Materials Physics, 69 (4), art. no. 045323, pp. 453231-453238.  
  ​Autores: Raigoza, N., Morales, A.L., Montes, A., Porras-Montenegro, N., Duque, C.A. 

• Exciton mixing and internal transitions of neutral magnetoexcitons in quantum wells
  Physica Status Solidi (B) Basic Research, 241 (10), pp. 2434-2439.   
  Autores: Duque, C.A., Barticevic, Z., Pacheco, M., Oliveira, L.E.
  DOI: 10.1002/pssb.200404902

• Donor-related photoionization cross-section of GaAs-(Ga, Al)As quantum dots: Hydrostatic pressure effects
  Physica Status Solidi (B) Basic Research, 241 (10), pp. 2440-2443. 
  ​Autores: Correa, J.D., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1002/pssb.200404908

• Hydrostatic pressure effects on the donor impurity-related photoionization cross-section in cylindrical-shaped GaAs/GaAlAs quantum well wires
  Physica Status Solidi (B) Basic Research, 241 (14), pp. 3311-3317. 
  Autores: Correa, J.D., Cepeda-Giraldo, O., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1002/pssb.200405225

• Symmetric and asymmetric GaAs/Al0.3Ga0.7As double quantum well subjected to hydrostatic pressure and applied electric field 
  Physica Status Solidi (B) Basic Research, 241 (14), pp. 3224-3230. 
  Autores: Morales, A.L., Raigoza, N., Montes, A., Porras-Montenegro, N., Duque, C.A.
  DOI: 10.1002/pssb.200405224

• Theoretical study of the effect of applied stress on the binding energy of a donor impurity in GaAs quantum well dot within an infinite potential barrier
  Indian Journal of Pure and Applied Physics, 42 (12), pp. 908-911. 
  Autores:Oyoko, H.O., Duque, C.A., Porras-Montenegro, N.

Artículos publicados 2003

• Binding energy and density of shallow impurity states in GaAs-(Ga, Al)As quantum wells: Effects of an applied hydrostatic stress 
  Semiconductor Science and Technology, 18 (7), pp. 718-722. 
  Autores: López, S.Y., Porras-Montenegro, N., Duque, C.A. 
  DOI: 10.1088/0268-1242/18/7/322

• Magnetic-field effects on excitons trapped in quantum dots/interface defects in narrow quantum wells  
  Physical Review B - Condensed Matter and Materials Physics, 68 (7), art. no. 073312, pp. 733121-733124.
  Autores:  Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 

• Effects of hydrostatic stress on the density of impurity states and donor-related optical absorption spectra in GaAs-(Ga,Al)As quantum wells
  Physica Status Solidi Conferences, 0 (2), pp. 648-651.  
  Autores: López, S.Y., Porras-Montenegro, N., Duque, C.A. 

• Donor-related density of states and polarizability in a GaAs-(Ga, Al)As quantum-well under hydrostatic pressure and applied electric field  
  Physica Status Solidi Conferences, 0 (2), pp. 652-656.   
  Autores:Morales, A.L., Montes, A., López, S.Y., Raigoza, N., Duque, C.A.

• Exciton trapping in interface defects/quantum dots in narrow quantum wells: Magnetic-field effects
  Physica B: Condensed Matter, 340-342, pp. 1090-1093. 
  ​Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1016/j.physb.2003.09.181

Artículos publicados 2002

• Intra-magnetoexciton transitions in semiconductor quantum wells
  Materials Research Society Symposium - Proceedings, 692, pp. 301-306.  
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 

• Shallow-donor states in spherical quantum dots with parabolic confinement
  Autores: Duque, C.A., Porras-Montenegro, N., De Dios-Leyva, M., Oliveira, L.E. 
  Materials Research Society Symposium - Proceedings, 692, pp. 473-476.  

• Magnetoexciton transitions in GaAs-Ga1-xAlxAs quantum wells
  Journal of Physics Condensed Matter, 14 (5), pp. 1021-1033. 
  Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1088/0953-8984/14/5/307

• Simultaneous effects of hydrostatic stress and an electric field on donors in a GaAs-(Ga, Al)As quantum well
  Journal of Physics Condensed Matter, 14 (5), pp. 987-995. 
  Autores: Morales, A.L., Montes, A., López, S.Y., Duque, C.A. 
  DOI: 10.1088/0953-8984/14/5/304

• Near-field optical imaging and spectroscopy of single GaAs quantum wires
  Physica Status Solidi (A) Applied Research, 190 (3), pp. 749-753.  
  Autores: Oliveira, L.E., Duque, C.A., Porras-Montenegro, N. 
  DOI: 10.1002/1521-396X(200204)190:3<749::AID-PSSA749>3.0.CO;2-S

• Magnetoabsorption spectra of intraexcitonic transitions in GaAs-(Ga,Al)As semiconductor quantum wells
  Journal of Applied Physics, 92 (3), pp. 1227-1231. 
  ​Autores: Barticevic, Z., Pacheco, M., Duque, C.A., Oliveira, L.E. 
  DOI: 10.1063/1.1489495

• Binding energy for a shallow donor impurity in GaAs-(Ga, Al)As quantum wells under hydrostatic pressure and applied electric field
  Surface Review and Letters, 9 (5-6), pp. 1753-1756.  
  Autores: Montes, A., Morales, A.L., Duque, C.A. 

Artículos publicados 2001

• Binding energy and polarizability in GaAs-(Ga,Al)As quantum-well wires
  Physica B: Condensed Matter, 302-303, pp. 84-87. 
  Autores: Duque, C.A., Montes, A., Morales, A.L. 
  DOI: 10.1016/S0921-4526(01)00410-0

• Shallow-donor states in semiconductor heterostructures within the fractional-dimensional space approach
  Physica B: Condensed Matter, 302-303, pp. 72-76. 
  Autores: Oliveira, L.E., Duque, C.A., Porras-Montenegro, N., De Dios-Leyva, M.
  DOI: 10.1016/S0921-4526(01)00408-2

• Uniaxial stress dependence of the binding energy of shallow donor impurities in GaAs-(Ga,AI)As quantum dots
  Journal of Applied Physics, 90 (2), pp. 819-823. 
  ​Autores: Oyoko, H.O., Duque, C.A., Porras-Montenegro, N. 
  DOI: 10.1063/1.1372976

Artículos publicados 2000

• Density of states of a donor impurity in a GaAs quantum box under the action of an applied electric field  
  Physica Status Solidi (B) Basic Research, 220 (1), pp. 181-185.  
  ​Autores: Montes, A., Duque, C.A., Porras-Montenegro, N. 

• Intraexcitonic energy transition in GaAs quantum wells
  Physica Status Solidi (B) Basic Research, 220 (1), pp. 131-135.  
  Autores: Ospina, W., Aristizabal, P., Restrepo, R.L., Montes, A., Duque, C.A.

• Polaron free energy in GaAs quantum wells  
  Physica Status Solidi (B) Basic Research, 220 (1), pp. 159-162.  
  Autores:  Mora-Ramos, M.E., Duque, C.A.

• Confined magneto-excitons in GaAs-(Ga, Al)As quantum wells
  Physica Status Solidi (B) Basic Research, 220 (1), pp. 137-140. 
  Autores: Beltrán, C.L., Duque, C.A., Montes, A., Porras-Montenegro, N., Oliveira, L.E. 

• Internal transitions of confined magnetoexcitons in GaAs-(Ga,Al)As quantum wells
  Physical Review B - Condensed Matter and Materials Physics, 61 (15), pp. 9936-9939.  
  Autores: Duque, C.A., Beltrán, C.L., Montes, A., Porras-Montenegro, N., Oliveira, L.E. 
   

Artículos publicados 1999

• Theoretical study of the density of shallow-acceptor impurity states in quantum-size GaAs microcrystals
  Semiconductor Science and Technology, 14 (6), pp. 496-500. 
  Autores: Duque, C.A., Montes, A., Porras-Montenegro, N., Oliveira, L.E. 
  DOI: 10.1088/0268-1242/14/6/302

Artículos publicados 1998

• Theoretical modeling of the photoluminescence spectra associated with free-carrier to acceptor-impurity recombination in quantum-size GaAs wire crystals
  Journal of Applied Physics, 83 (11), pp. 6199-6201.  
  Autores: Duque, C.A., Porras-Montenegro, N., Latgé, A., Oliveira, L.E. 

• Density of shallow-donor impurity states in rectangular cross section GaAs quantum-well wires under applied electric field
  Journal of Physics Condensed Matter, 10 (24), pp. 5351-5358. 
  Autores: Montes, A., Duque, C.A., Porras-Montenegro, N. 
  DOI: 10.1088/0953-8984/10/24/012

• Electric field effects on the states of a donor impurity in rectangular cross-section vacuum/GaAs/vacuum quantum-well wires
  Journal of Applied Physics, 84 (3), pp. 1421-1425.  
  ​Autores: Montes, A., Duque, C.A., Porras-Montenegro, N.

• Binding energy of the ground and first few excited states of a shallow-donor impurity in rectangular-cross-sectional area GaAs quantum-well wires under applied electric field
  Physica Status Solidi (B) Basic Research, 210 (2), pp. 731-736. 
  Autores: Montes, A., Duque, C.A., Porras-Montenegro, N.

Artículos publicados 1997

• Effects of applied electric fields on the infrared transitions between hydrogenic states in GaAs low-dimensional systems
  Physical Review B - Condensed Matter and Materials Physics, 55 (16), pp. 10721-10728. 
  Autores: Duque, C.A., Morales, A.L., Montes, A., Porras-Montenegro, N.

• The binding energies of shallow donor impurities in GaAs quantum-well wires under applied electric fields
  Journal of Applied Physics, 81 (12), pp. 7890-7894.  
  Autores: Montes, A., Duque, C.A., Porras-Montenegro, N.

• Effects of an applied electric field on the binding energy of shallow donor impurities in GaAs low-dimensional systems
  Journal of Physics Condensed Matter, 9 (27), pp. 5977-5987. 
  ​Autores: Duque, C.A., Montes, A., Morales, A.L., Porras-Montenegro, N. 
  DOI: 10.1088/0953-8984/9/27/023

• Impurity excited states in GaAs low dimensional systems under applied electric fields
  Brazilian Journal of Physics, 27 (4), pp. 206-210.   
  Autores:  Duque, C.A., Porras-Montenegro, N.