WASET
    Ling Ai Wong and  Hussain Shareef and  Azah Mohamed and  Ahmad Asrul Ibrahim,  Optimal Placement and Sizing of Energy Storage System in Distribution Network with Photovoltaic Based Distributed Generation Using Improved Firefly Algorithms.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 127(7). 895 - 903
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10007638.