@inproceedings{PS-1981-Cristian,
	author        = "Flaviu Cristian",
	booktitle     = "{Proceedings of a Workshop on Program Specification}",
	doi           = "10.1007/3-540-11490-4_16",
	isbn          = "3-540-11490-4",
	pages         = "215--254",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Robust Data Types}",
	volume        = 134,
	year          = 1981,
}