Abdellatif, Sameh Osama, et al. “Modelling Various Solar Cells Materials Using Lorentzian-Drude Coefficients”. International Journal of Recent Contributions from Engineering, Science & IT (iJES), vol. 4, no. 4, Dec. 2016, pp. pp. 63-67, doi:10.3991/ijes.v4i4.6566.