@inproceedings{ICFP-2007-Pfenning,
	author        = "Frank Pfenning",
	booktitle     = "{Proceedings of the 12th International Conference on Functional Programming}",
	doi           = "10.1145/1291151.1291153",
	editor        = "Ralf Hinze and Norman Ramsey",
	isbn          = "978-1-59593-815-2",
	pages         = "219",
	publisher     = "{ACM}",
	title         = "{Subtyping and intersection types revisited}",
	year          = 2007,
}