@article{VLDB-2009-HeerH,
	author        = "Jeffrey Heer and Joseph M. Hellerstein",
	ee            = "http://www.vldb.org/pvldb/2/vldb09-tutorial2.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 2,
	pages         = "1656--1657",
	title         = "{Data visualization & social data analysis}",
	volume        = 2,
	year          = 2009,
}