D. G.V.K.R. Sastry, D. G. Surya Kalyan, and K. Tejeswara Rao, “A New Method for the Order Reduction of Multivariable Systems Using Bilinear Transformation and Time Moments Matching Technique”, IJET, vol. 7, no. 4.22, pp. 197–201, Nov. 2018, doi: 10.14419/ijet.v7i4.22.28696.