@inproceedings{ICALP-1980-EhrigKP,
	author        = "Hartmut Ehrig and Hans-Jörg Kreowski and Peter Padawitz",
	booktitle     = "{Proceedings of the Seventh Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/3-540-10003-2_67",
	isbn          = "3-540-10003-2",
	pages         = "142--156",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Algebraic Implementation of Abstract Data Types: Concept, Syntax, Semantics and Correctness}",
	volume        = 85,
	year          = 1980,
}