C. B. Vishwakarma,  Modified Hankel Matrix Approach for Model Order Reduction in Time Domain.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2014, vol. 86(2). 404 - 410
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/9997728.