C.B. Vishwakarma,  Order Reduction using Modified Pole Clustering and Pade Approximations.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 1003 - 1007
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/4622.