Structural properties of inverse linear systems. - A. Clive Pugh; Nicholas P. Karampetakis; Antonis-Ioannis G. Vardulakis; G. E. Hayton (Kybernetika, 1994)

A fundamental notion of equivalence for linear multivariable systems. - A. Clive Pugh; Nicholas P. Karampetakis; Antonis-Ioannis G. Vardulakis; G. E. Hayton (IEEE Trans. Autom. Control., 1994)

An extension of Wolovich's definition of equivalence of linear systems. - Nicholas P. Karampetakis; A. Clive Pugh; Antonis-Ioannis G. Vardulakis; G. E. Hayton (IEEE Trans. Autom. Control., 1996)

Notes on a hierarchical theory of systems and applications. - Nicholas P. Karampetakis; A. Clive Pugh; G. E. Hayton (Kybernetika, 1997)

A test for behavioral equivalence. - Ming Hou 001; A. Clive Pugh; G. E. Hayton (IEEE Trans. Autom. Control., 2000)

Equivalence and reduction of 2-D systems. - A. Clive Pugh; S. J. McInerney; G. E. Hayton (CDC, 2002)