Interpreting Movement Manner. - Liwei Zhao; Monica Costa; Norman I. Badler (CA, 2000)

To Gesture or Not to Gesture: What is the Question? - Norman I. Badler; Monica Costa; Liwei Zhao; Diane M. Chi (Computer Graphics International, 2000)

The EMOTE model for effort and shape. - Diane M. Chi; Monica Costa; Liwei Zhao; Norman I. Badler (SIGGRAPH, 2000)