Al-Rawahi, N., Zurigat, Y. and Al-Azri, N. (2011) “Prediction of Hourly Solar Radiation on Horizontal and Inclined Surfaces for Muscat/Oman”, The Journal of Engineering Research [TJER], 8(2), pp. 19–31. doi: 10.24200/tjer.vol8iss2pp19-31.