@inproceedings{SIGMOD-2010-WuOT,
	author        = "Sai Wu and Beng Chin Ooi and Kian-Lee Tan",
	booktitle     = "{Proceedings of the 28th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1807167.1807238",
	isbn          = "978-1-4503-0032-2",
	pages         = "651--662",
	publisher     = "{ACM}",
	title         = "{Continuous sampling for online aggregation over multiple queries}",
	year          = 2010,
}