M. H. Abedi and  A. Jalilvand,  Optimal Type and Installation Time of Wind Farm in a Power System, Considering Service Providers.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2016, vol. 115(7). 948 - 952
    [viewed 21 January 2022]. Available from: https://publications.waset.org/pdf/10004998.