@inproceedings{ECOOP-1993-BalstersBZ,
	author        = "Herman Balsters and Rolf A. de By and Roberto Zicari",
	booktitle     = "{Proceedings of the Seventh European Conference on Object-Oriented Programming}",
	doi           = "10.1007/3-540-47910-4_10",
	editor        = "Oscar Nierstrasz",
	isbn          = "3-540-57120-5",
	pages         = "161--184",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Typed Sets as a Basis for Object-Oriented Database Schemas}",
	volume        = 707,
	year          = 1993,
}