@inproceedings{PODS-2006-GottlobN,
	author        = "Georg Gottlob and Alan Nash",
	booktitle     = "{Proceedings of the 25th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1142351.1142358",
	isbn          = "1-59593-318-2",
	pages         = "40--49",
	publisher     = "{ACM}",
	title         = "{Data exchange: computing cores in polynomial time}",
	year          = 2006,
}