@article{VLDB-2014-GyssensPGWW13,
	author        = "Marc Gyssens and Jan Paredaens and Dirk Van Gucht and Jef Wijsen and Yuqing Wu",
	ee            = "http://www.vldb.org/pvldb/vol7/p25-gyssens.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 1,
	pages         = "25--36",
	title         = "{An Approach towards the Study of Symmetric Queries}",
	volume        = 7,
	year          = 2013,
}