@inproceedings{SIGMOD-2009-AngelKSS,
	author        = "Albert Angel and Nick Koudas and Nikos Sarkas and Divesh Srivastava",
	booktitle     = "{Proceedings of the 27th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1559845.1559977",
	isbn          = "978-1-60558-551-2",
	pages         = "1047--1050",
	publisher     = "{ACM}",
	title         = "{What’s on the grapevine?}",
	year          = 2009,
}