@article{VLDB-2011-KhannaRT,
	author        = "Sanjeev Khanna and Sudeepa Roy and Val Tannen",
	ee            = "http://www.vldb.org/pvldb/vol4/p1051-khanna.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 11,
	pages         = "1051--1062",
	title         = "{Queries with Difference on Probabilistic Databases}",
	volume        = 4,
	year          = 2011,
}