Kamaruzzaman Sopian, Ali H A Alwaeli, Husam Abdulrasool Hasan, and Ali Najah Al-Shamani, “Advances in High Efficiency Photovoltaic Thermal Solar Collectors”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 47, no. 1, pp. 1–7, Jul. 2018.