Sulaymon, Abbas Hamid, Emad Talib Hahsim, and Shaymaa Alaulddin Mahdi. 2013. “Efficiency Prediction and Performance Characterization of Photovoltaic Solar Panel at Baghdad Climate Conditions”. Al-Khwarizmi Engineering Journal 9 (2): 57-68. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/168.