@inproceedings{IFL-2001-ButterfieldS,
	author        = "Andrew Butterfield and Glenn Strong",
	booktitle     = "{Selected Papers of the 13th International Workshop on Implementation of Functional Languages}",
	doi           = "10.1007/3-540-46028-4_5",
	isbn          = "3-540-43537-9",
	pages         = "72--87",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Proving Correctness of Programs with IO — A Paradigm Comparison}",
	volume        = 2312,
	year          = 2001,
}