@article {RP-85-03,
	title = {Generalized Inverses and the Calculation of Symbolic Invariants for Colored Petri Nets},
	journal = {Technique et Science Informatique (TSI)},
	volume = {4},
	year = {1985},
	month = {1},
	pages = {113-126},
	author = {H. Alla and P. Ladet}
}

