1) L.M. Siverman and H.J. Payne: Input-Output Structure of Linear Systems with Application to the Decoupling Problem, SIAM, J. on Control, 9-2, 199/233 (1971)
3) B.C. Moore and L.M. Silverman: Model Matching by State Feedback and Dynamic Compensation, IEEE Trans. on Automatic Control, AC-17-4, 491/497 (1972)
4) G.D. Forney, Jr.: Minimal Bases of Rational Vector spaces with Application to Multivariable Linear Systems, SIAM. J. on Control, 13-3, 493/520 (1975)