@inproceedings{HT-2009-RafelsbergerS,
	author        = "Walter Rafelsberger and Arno Scharl",
	booktitle     = "{Proceedings of the 20th Conference on Hypertext and Hypermedia}",
	doi           = "10.1145/1557914.1557948",
	isbn          = "978-1-60558-486-7",
	pages         = "193--198",
	publisher     = "{ACM}",
	title         = "{Games with a purpose for social networking platforms}",
	year          = 2009,
}