@inproceedings{SIGMOD-2003-ZhangZPTL,
	author        = "Jun Zhang and Manli Zhu and Dimitris Papadias and Yufei Tao and Dik Lun Lee",
	booktitle     = "{Proceedings of the 31st ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/872757.872812",
	isbn          = "1-58113-634-X",
	pages         = "443--454",
	publisher     = "{ACM}",
	title         = "{Location-based Spatial Queries}",
	year          = 2003,
}