@inproceedings{TOOLS-EUROPE-2000-KleppeW00a,
	author        = "Anneke Kleppe and Jos Warmer",
	booktitle     = "{Proceedings of the 33rd International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.2000.10010",
	isbn          = "0-7695-0731-X",
	pages         = "456",
	publisher     = "{IEEE Computer Society}",
	title         = "{An Introduction to the Object Constraint Language (OCL)}",
	year          = 2000,
}