Djilani Kobibi Youcef Islam and  Hadjeri Samir and  Djehaf Mohamed Abdeldjalil,  Power Flow and Modal Analysis of a Power System Including Unified Power Flow Controller.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 110(2). 189 - 195
    [viewed 23 September 2020]. Available from: https://publications.waset.org/pdf/10003493.