Mehdi Nafar and  Mohammad Reza Mansouri,  A Study on the Power Control of Wind Energy Conversion System.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2106, vol. 1191(3). 1 - 8
    [viewed 12 November 2019]. Available from: https://publications.waset.org/pdf/10007112.