Ermanu A. Hakim and  Adi Soeprijanto and  Mauridhi H.P,  Fuzzy PID based PSS Design Using Genetic Algorithm.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2009, vol. 26(2). 328 - 331
    [viewed 25 January 2020]. Available from: https://publications.waset.org/pdf/14843.