Abdellatif Kasbi and  Abderrafii Rahali,  Doubly Fed Induction Generator Based Variable Speed Wind Conversion System Control Enhancement by Applying Fractional Order Controller.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2019, vol. 155(11). 693 - 709
    [viewed 16 December 2019]. Available from: https://publications.waset.org/pdf/10010884.