Youcef Bekakra and  Djilani Ben attous,  Active and Reactive Power Control of a DFIG with MPPT for Variable Speed Wind Energy Conversion using Sliding Mode Control.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1607 - 1613
    [viewed 09 August 2020]. Available from: https://publications.waset.org/pdf/3431.