@inproceedings{ICALP-1992-Krob,
	author        = "Daniel Krob",
	booktitle     = "{Proceedings of the 19th International Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/3-540-55719-9_67",
	isbn          = "3-540-55719-9",
	pages         = "101--112",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The Equality Problem for Rational Series with Multiplicities in the Tropical Semiring is Undecidable}",
	volume        = 623,
	year          = 1992,
}