@inproceedings{PODS-1999-KolliosGT,
	author        = "George Kollios and Dimitrios Gunopulos and Vassilis J. Tsotras",
	booktitle     = "{Proceedings of the 18th Symposium on Principles of Database Systems}",
	cdrom         = "DiSC2_1/out/papers/pods/onindexingmobilgediv.pdf",
	doi           = "10.1145/303976.304002",
	isbn          = "1-58113-062-7",
	pages         = "261--272",
	publisher     = "{ACM Press}",
	title         = "{On Indexing Mobile Objects}",
	year          = 1999,
}