@inproceedings{ECOOP-2002-IgarashiV,
	author        = "Atsushi Igarashi and Mirko Viroli",
	booktitle     = "{Proceedings of the 16th European Conference on Object-Oriented Programming}",
	editor        = "Boris Magnusson",
	ee            = "http://link.springer.de/link/service/series/0558/bibs/2374/23740441.htm",
	isbn          = "3-540-43759-2",
	pages         = "441--469",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{On Variance-Based Subtyping for Parametric Types}",
	volume        = 2374,
	year          = 2002,
}