A. Al-Dabbagh, E., ارادة, R. M. Ibrahim, and رغید. “Doping Effects on Electrical and Dynamical Characteristics of GaAs / AlGaAs Quantum Cascade Laser”. Journal of Education and Science (JES), vol. 21, no. 4, Dec. 2008, pp. 88-96, doi:10.33899/edusj.2008.56103.