@inproceedings{CSL-1993-Hishfeld,
	author        = "Yoram Hirshfeld",
	booktitle     = "{Selected Papers of the Seventh Workshop on Computer Science Logic}",
	doi           = "10.1007/BFb0049331",
	isbn          = "3-540-58277-0",
	pages         = "165--174",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Petri Nets and the Equivalence Problem}",
	volume        = 832,
	year          = 1993,
}