@inproceedings{PODS-2010-Wijsen,
	author        = "Jef Wijsen",
	booktitle     = "{Proceedings of the 29th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1807085.1807111",
	isbn          = "978-1-4503-0033-9",
	pages         = "179--190",
	publisher     = "{ACM}",
	title         = "{On the first-order expressibility of computing certain answers to conjunctive queries over uncertain databases}",
	year          = 2010,
}