@inproceedings{SIGMOD-2008-JefferyFH,
	author        = "Shawn R. Jeffery and Michael J. Franklin and Alon Y. Halevy",
	booktitle     = "{Proceedings of the 26th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1376616.1376701",
	isbn          = "978-1-60558-102-6",
	pages         = "847--860",
	publisher     = "{ACM}",
	title         = "{Pay-as-you-go user feedback for dataspace systems}",
	year          = 2008,
}