Khalid K. Mohammed, Dr. “The Electrical and Optical Properties of SnO2 – Si(n) Structure Solar Cells”. Al-Rafidain Engineering Journal (AREJ) 13, no. 3 (September 28, 2005): 1–8. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/arej/article/view/27019.