@inproceedings{TOOLS-USA-1999-GilHK,
	author        = "Joseph Yossi Gil and John Howse and Stuart Kent",
	booktitle     = "{Proceedings of the 30th International Conference on Technology of Object-Oriented Languages and Systems}",
	doi           = "10.1109/TOOLS.1999.10066",
	isbn          = "0-7695-0278-4",
	pages         = "453--463",
	publisher     = "{IEEE Computer Society}",
	title         = "{Constraint Diagrams: A Step Beyond UML}",
	year          = 1999,
}