Notes on a hierarchical theory of systems and applications Nikolas P. Karampetakis; Ashley Clive Pugh; G. E. Hayton — 1997 Kybernetika
A classification of generalised state space reduction methods for linear multivariable systems Nikolas P. Karampetakis; Antonis I. G. Vardulakis; Ashley Clive Pugh — 1995 Kybernetika
Structural properties of inverse linear systems Ashley Clive Pugh; Nikolas P. Karampetakis; Antonis I. G. Vardulakis; G. E. Hayton — 1994 Kybernetika