@inproceedings{CHI-2006-AhnLB,
	author        = "Luis von Ahn and Ruoran Liu and Manuel Blum",
	booktitle     = "{Proceedings of the 24th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1124772.1124782",
	isbn          = "1-59593-372-7",
	pages         = "55--64",
	publisher     = "{ACM}",
	title         = "{Peekaboom: a game for locating objects in images}",
	year          = 2006,
}