1. André, E. (1995). Ein planbasierter Ansatz zur Generierung multimedialer Präsentationen, DISKI 108, infix.
2. André, E. (1997). WIP and PPP: A Comparison of two Multimedia Presentation Systems in Terms of the Standard Reference Model, in: Computer Standards and Interfaces, Volume 18,No: 6-7, pp. 555–564.
3. Lester, J.C., S.A. Converse, S.E. Kahler, S.T. Barlow, B.A. Stone, and R.S. Bhogal. 1997. The persona effect: Affective impact of animated pedagogical agents. In S. Pemberton, ed., Human factors in computing systems, CHI’97 conference proceedings, 359–366. New York: ACM Press.
4. Ortony, A., Clore, G.L., and Collins, A. (1988). The Cognitive Structure of Emotions. Cambridge: Cambridge University Press.
5. McCrae, R.R., and John, O.P. (1992). An introduction to the five-factor model and its applications. Special Issue: The five-factor model: Issues and applications. Journal of Personality 60: 175–215, 1992.