Entertainment Computing – ICEC 2013 12th International Conference, ICEC 2013, São Paulo, Brazil, October 16-18, 2013. Proceedings - Anacleto, Junia C.; Clua, Esteban W. G.; Silva, Flavio S. Correa da; Fels, Sidney; Yang, Hyun S. (Springer Berlin Heidelberg : Imprint: Springer, 2013)