@inproceedings{CIKM-2009-YangLJ,
	author        = "Bin Yang and Hua Lu and Christian S. Jensen",
	booktitle     = "{Proceedings of the 18th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1645953.1646039",
	isbn          = "978-1-60558-512-3",
	pages         = "671--680",
	publisher     = "{ACM}",
	title         = "{Scalable continuous range monitoring of moving objects in symbolic indoor space}",
	year          = 2009,
}