Animated conversation: rule-based generation of facial expression, gesture & spoken intonation for multiple conversational agents (1994)

by J Cassell, C Pelachaud, N Badler, M Steedman, B Achorn, T Becket, B Douville, S Prevost, M Stone
Venue:In Proceedings of the 21st Annual Conference on Computer Graphics and interactive Techniques SIGGRAPH '94. ACM