@inproceedings{PODS-2003-BabcockDMO,
	author        = "Brian Babcock and Mayur Datar and Rajeev Motwani and Liadan O'Callaghan",
	booktitle     = "{Proceedings of the 22nd Symposium on Principles of Database Systems}",
	doi           = "10.1145/773153.773176",
	isbn          = "1-58113-670-6",
	pages         = "234--243",
	publisher     = "{ACM}",
	title         = "{Maintaining variance and k-medians over data stream windows}",
	year          = 2003,
}