@article{VLDB-2012-AlyAO,
	author        = "Ahmed M. Aly and Walid G. Aref and Mourad Ouzzani",
	ee            = "http://vldb.org/pvldb/vol5/p1100_ahmedmaly_vldb2012.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 11,
	pages         = "1100--1111",
	title         = "{Spatial Queries with Two kNN Predicates}",
	volume        = 5,
	year          = 2012,
}