@inproceedings{OOPSLA-ECOOP-1990-BearACH,
	author        = "Stephen Bear and Phillip Allen and Derek Coleman and Fiona Hayes",
	booktitle     = "{Proceedings of the Fifth Conference on Object-Oriented Programming, Systems, Languages and Applications / Fourth European Conference on Object-Oriented Programming}",
	doi           = "10.1145/97945.97950",
	editor        = "Akinori Yonezawa",
	isbn          = "0-89791-411-2",
	pages         = "28--37",
	publisher     = "{ACM}",
	title         = "{Graphical Specification of Object-Oriented Systems}",
	year          = 1990,
}