@inproceedings{ECOOP-1994-LopezFB,
	author        = "Gus Lopez and Bjørn N. Freeman-Benson and Alan Borning",
	booktitle     = "{Proceedings of the Eighth European Conference on Object-Oriented Programming}",
	doi           = "10.1007/BFb0052187",
	editor        = "Mario Tokoro and Remo Pareschi",
	isbn          = "3-540-58202-9",
	pages         = "260--279",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Constraints and Object Identity}",
	volume        = 821,
	year          = 1994,
}