WASET
    Naima Ikken and  Abdelhadi Bouknadel and  Nour-eddine Tariba Ahmed Haddou and  Hafsa El Omari,  A Grid Synchronization Phase Locked Loop Method for Grid-Connected Inverters Systems.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2021, vol. 172(4). 137 - 140
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10011956.