Al-Rawahi, N.Z., Y.H. Zurigat, and N.A. Al-Azri. “Prediction of Hourly Solar Radiation on Horizontal and Inclined Surfaces for Muscat/Oman”. The Journal of Engineering Research [TJER] 8, no. 2 (December 1, 2011): 19–31. Accessed April 19, 2024. https://journals.squ.edu.om/index.php/tjer/article/view/98.