Malinwo Estone Ayikpa,  Unbalanced Distribution Optimal Power Flow to Minimize Losses with Distributed Photovoltaic Plants .   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 207 - 212
    [viewed 21 November 2019]. Available from: https://publications.waset.org/pdf/10006578.