@inproceedings{PODS-2006-Fagin,
	author        = "Ronald Fagin",
	booktitle     = "{Proceedings of the 25th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1142351.1142359",
	isbn          = "1-59593-318-2",
	pages         = "50--59",
	publisher     = "{ACM}",
	title         = "{Inverting schema mappings}",
	year          = 2006,
}