@inproceedings{POPL-2007-BerdineCCDO,
	author        = "Josh Berdine and Aziem Chawdhary and Byron Cook and Dino Distefano and Peter W. O'Hearn",
	booktitle     = "{Proceedings of the 34th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/1190216.1190249",
	editor        = "Martin Hofmann and Matthias Felleisen",
	isbn          = "1-59593-575-4",
	pages         = "211--224",
	publisher     = "{ACM}",
	title         = "{Variance analyses from invariance analyses}",
	year          = 2007,
}