Singh, Ramveer, Kalyan Chatterjee, and Jay Singh. “A Mixed Approach for Approximation of Higher Order Linear Time Invariant Systems”. International Journal of Engineering & Technology 7, no. 4.39 (December 13, 2018): 375–380. Accessed April 29, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/23966.