A. Safari and  H. Shayeghi and  H. A. Shayanfar,  IPSO Based UPFC Robust Output Feedback Controllers for Damping of Low Frequency Oscillations.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2009, vol. 28(4). 885 - 889
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/13533.