@inproceedings{OOPSLA-ECOOP-1990-PalsbergS,
	author        = "Jens Palsberg and Michael I. Schwartzbach",
	booktitle     = "{Proceedings of the Fifth Conference on Object-Oriented Programming, Systems, Languages and Applications / Fourth European Conference on Object-Oriented Programming}",
	doi           = "10.1145/97945.97965",
	editor        = "Akinori Yonezawa",
	isbn          = "0-89791-411-2",
	pages         = "151--160",
	publisher     = "{ACM}",
	title         = "{Type Substitution for Object-Oriented Programming}",
	year          = 1990,
}