@inproceedings{SIGMOD-2013-LongWWF,
	author        = "Cheng Long and Raymond Chi-Wing Wong and Ke Wang and Ada Wai-Chee Fu",
	booktitle     = "{Proceedings of the 31st ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/2463676.2465275",
	isbn          = "978-1-4503-2037-5",
	pages         = "689--700",
	publisher     = "{ACM}",
	title         = "{Collective spatial keyword queries: a distance owner-driven approach}",
	year          = 2013,
}