N. Ouldcherchali and  M. S. Boucherit and  L. Barazane and  A. Morsli,  Study of Two MPPTs for Photovoltaic Systems Using Controllers Based in Fuzzy Logic and Sliding Mode.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2015, vol. 101(5). 1260 - 1265
    [viewed 21 October 2019]. Available from: https://publications.waset.org/pdf/10001464.