Sherif O. Zain Elabideen and  Ahmed A. Helal and  Ibrahim F. El-Arabawy,  Low Voltage Ride through Capability Techniques for DFIG-Based Wind Turbines.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2016, vol. 115(7). 910 - 918
    [viewed 23 October 2019]. Available from: https://publications.waset.org/pdf/10004900.