Yasser Fathi Nassar, Samer Yassin Alsadi, Khalid Amer Ali, Abdalaziz Hassan Yousef, and Massoud Ali Fakher, “Numerical Analysis and Optimization of Area Contribution of The PV Cells in the PV/T Flat-Plate Solar Air Heating Collector”, J. Solar Eneg. Res. Updat., vol. 6, pp.  43–50, Jan. 2019.