@inproceedings{POPL-2009-XuJC,
	author        = "Dana N. Xu and Simon L. Peyton Jones and Koen Claessen",
	booktitle     = "{Proceedings of the 36th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/1480881.1480889",
	editor        = "Zhong Shao and Benjamin C. Pierce",
	isbn          = "978-1-60558-379-2",
	pages         = "41--52",
	publisher     = "{ACM}",
	title         = "{Static contract checking for Haskell}",
	year          = 2009,
}