[HS13]
T.H. Hughes and M.C. Smith,
Algebraic criteria for circuit realisations,
Mathematical System Theory - Festschrift in Honor of Uwe Helmke on the Occasion of his Sixtieth Birthday, Knut Huper and Jochen Trumpf (eds.), CreateSpace, 2013, ISBN 978-1470044008, pp. 211-228.,
2013
