@article{VLDB-2013-NirkhiwaleDJ,
	author        = "Supriya Nirkhiwale and Alin Dobra and Christopher M. Jermaine",
	ee            = "http://www.vldb.org/pvldb/vol6/p1798-nirkhiwale.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 14,
	pages         = "1798--1809",
	title         = "{A Sampling Algebra for Aggregate Estimation}",
	volume        = 6,
	year          = 2013,
}