@inproceedings{OOPSLA-1994-Kristensen,
	author        = "Bent Bruun Kristensen",
	booktitle     = "{Proceedings of the Ninth Annual Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/191080.191120",
	editor        = "Jeff McKenna and J. Eliot B. Moss and Richard L. Wexelblat",
	isbn          = "0-89791-688-3",
	pages         = "272--286",
	publisher     = "{ACM}",
	title         = "{Complex Associations: Abstractions in Object-Oriented Modeling}",
	year          = 1994,
}