1. Bailenson, J.N., Blascovich, J., Beall, A.C., Loomis, J.M.: Interpersonal distance in immersive virtual environments. Personality and Social Psychology Bulletin 29, 1–15 (2003)
2. Lecture Notes in Artificial Intelligence;A.J. Cowell,2003
3. Rickenberg, R., Reeves, B.: The effects of animated characters on anxiety, task performance, and evaluations of user interfaces. In: Letters of CHI 2000, pp. 49–56 (2000)
4. Slater, M., Steed, A.: Meeting People Virtually: Experiments in Shared Virtual Environments. In: Schroeder, R. (ed.) The Social Life of Avatars: Presence and Interaction in Shared Virtual Environments, pp. 145–171. Springer, Heidelberg (2002)
5. Krämer, N.C.: Bewegende Bewegung. Sozio-emotionale Wirkungen nonverbalen Verhaltens und deren experimentelle Untersuchung mittels Computeranimation. Pabst, Lengerich (2001)