Ahwide, Farag. 2017. “Prediction and Assessment of Direct and Diffse Radiation Fractions for Hourly, Daily and Monthly Average Global Radiation at Diffrent Latitude Locations in Libya”. Solar Energy and Sustainable Development Journal 6 (2):1-15. https://jsesd-ojs.csers.ly/ojs/index.php/jsesd/article/view/42.