WASET
    S. N. Deepa and  G. Sugumaran,  MPSO based Model Order Formulation Scheme for Discrete PID Controller Design.   journal   = {International Journal of Electrical and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1779 - 1786
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/8826.