@article{VLDB-2013-ParkW,
	author        = "Hyunjung Park and Jennifer Widom",
	ee            = "http://www.vldb.org/pvldb/vol6/p781-park.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 10,
	pages         = "781--792",
	title         = "{Query Optimization over Crowdsourced Data}",
	volume        = 6,
	year          = 2013,
}