@inproceedings{Tak09, author = {Takhtamysheva, A. and Porzel, R. and Krause, M.}, title = {Games for games: manipulating contexts in human computation games}, booktitle = {HCOMP '09 }, year = {2009}, editor = {Ahn, L.}, publisher = {ACM}, doi = {10.1145/1600150.1600164}, pages = {38-39} }