@inproceedings{OOPSLA-1989-Freeman-Benson,
	author        = "Bjørn N. Freeman-Benson",
	booktitle     = "{Proceedings of the Fourth Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/74877.74918",
	editor        = "George Bosworth",
	isbn          = "0-89791-333-7",
	pages         = "389--396",
	publisher     = "{ACM}",
	title         = "{A Module Mechanism for Constraints in Smalltalk}",
	year          = 1989,
}