@incollection{
OlsDeS:98-96,
author={G.J. Olsder and B. {D}e Schutter},
title={The minimal realization problem in the max-plus algebra},
chapter={32},
booktitle={Open Problems in Mathematical Systems and Control Theory},
editor={V.D. Blondel and E.D. Sontag and M. Vidyasagar and J.C. Willems},
publisher={Springer},
address={London, UK},
pages={157--162},
year={1999},
doi={
10.1007/978-1-4471-0807-8_32}
}