A. Al-Rashidi and  A. El-Hamalawi,  A Performance Study of Fixed, Single-Axis and Dual-Axis Photovoltaic Systems in Kuwait .   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2016, vol. 117(9). 1217 - 1221
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/10005376.