C. Dormann, P. Barr, and R. Biddle. Sandbox '06: Proceedings of the 2006 ACM SIGGRAPH symposium on Videogames, page 95--98. New York, NY, USA, ACM, (2006)
I. Frank, N. Sanbou, and K. Terashima. ACE '06: Proceedings of the 2006 ACM SIGCHI international conference on Advances in computer entertainment technology, page 73. New York, NY, USA, ACM, (2006)
K. Gilleade, and A. Dix. ACE '04: Proceedings of the 2004 ACM SIGCHI International Conference on Advances in computer entertainment technology, page 228--232. New York, NY, USA, ACM, (2004)
J. Höysniemi, and P. Hämäläinen. DUX '05: Proceedings of the 2005 conference on Designing for User eXperience, page 28. New York, NY, USA, AIGA: American Institute of Graphic Arts, (2005)
M. Rauterberg. ICEC '03: Proceedings of the second international conference on Entertainment computing, page 1--8. Pittsburgh, PA, USA, Carnegie Mellon University, (2003)
D. Schuurman, K. Moor, L. Marez, and J. Looy. DIMEA '08: Proceedings of the 3rd international conference on Digital Interactive Media in Entertainment and Arts, page 46--50. New York, NY, USA, ACM, (2008)
J. Shanahan. Cambridge University Press, Cambridge, (1999)ID: L_OPAC_VOYAGER839821; M1: xiii, 267 s.; Includes bibliographical references (p. 251-264) and index; James Shanahan and Michael Morgan.; ID: JYKDOK.
M. Shapiro. ICEC '03: Proceedings of the second international conference on Entertainment computing, page 1--8. Pittsburgh, PA, USA, Carnegie Mellon University, (2003)