@inproceedings{TOOLS-EUROPE-1994-BaelenLS,
	author        = "Stefan Van Baelen and Johan Lewi and Eric Steegmans",
	booktitle     = "{Proceedings of the 13th International Conference on Technology of Object-Oriented Languages and Systems}",
	isbn          = "0-13-350539-1",
	pages         = "185--199",
	publisher     = "{Prentice Hall}",
	title         = "{Constraints in Object-Oriented Analysis and Design}",
	year          = 1994,
}