Yasser Aldali,  Comparison of Stationary and Two-Axis Tracking System of 50MW Photovoltaic Power Plant in  Al-Kufra, Libya: Landscape Impact and Performance.   journal   = {International Journal of Energy and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2014, vol. 92(8). 558 - 561
    [viewed 09 April 2020]. Available from: https://publications.waset.org/pdf/9998977.