S.F. Faisal and  A.H.M.A. Rahim and  J.M. Bakhashwain,   A Robust STATCOM Controller for a Multi-Machine Power System Using Particle Swarm Optimization and Loop-Shaping .   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 3(3). 513 - 519
    [viewed 06 May 2021]. Available from: https://publications.waset.org/pdf/247.