@article{VLDB-2011-RazniewskiN,
	author        = "Simon Razniewski and Werner Nutt",
	ee            = "http://www.vldb.org/pvldb/vol4/p749-razniewski.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 11,
	pages         = "749--760",
	title         = "{Completeness of Queries over Incomplete Databases}",
	volume        = 4,
	year          = 2011,
}