Ce Zhan Wanqing Li Farzad Safaei Philip Ogunbona Emotional states control for on-line game avatars. 31-36 2007 NETGAMES http://doi.acm.org/10.1145/1326257.1326263 conf/netgames/2007 db/conf/netgames/netgames2007.html#ZhanLSO07