@techreport{
OlsDeS:97-107,
author={B. {D}e Schutter and R. de Vries and G.J. Olsder},
title={The Minimal Realization Problem in the Max-Plus Algebra: {A}n
Overview},
number={97-107},
institution={ESAT-SISTA, K.U.Leuven},
address={Leuven, Belgium},
month=dec,
year={1997}
}