@inproceedings{ICEIS-1999-Goossens,
	author        = "Luc Goossens",
	booktitle     = "{Proceedings of the First International Conference on Enterprise Information Systems}",
	pages         = "427--434",
	title         = "{An Aggregation Based Approach to Reconcile Expressiveness and Unambiguity in Object Oriented Modelling Languages}",
	year          = 1999,
}