@inproceedings{CSL-2004-Vouillon,
	author        = "Jérôme Vouillon",
	booktitle     = "{Proceedings of the 13th EACSL Annual Conference / 18th International Workshop on Computer Science Logic}",
	doi           = "10.1007/978-3-540-30124-0_32",
	isbn          = "3-540-23024-6",
	pages         = "415--429",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Subtyping Union Types}",
	volume        = 3210,
	year          = 2004,
}