Ghoname Abdullah and  Hidekazu Nishimura,  Photovoltaic Array Cleaning System Design and Evaluation.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2021, vol. 174(6). 248 - 251
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/10012086.