1. A. Ortony, A. Collins, and G. L. Clore, The Cognitive Structure of Emotions. Cambridge: Cambridge University Press, 1988.
2. I. Matthis, “Sketch for a metapsychology of affect,” The International Journal of Psychoanalysis, vol. 81, pp. 215–227, 2000.
3. S. Russell and P. Norvig, Artificial Intelligence: A Modern Approach. London: Prentice Hall, 1995.
4. P. Petta, “Identifying theoritical problems,” in Proceedings of the first HUMAINE Workshop on Theories and Models of Emotion, June 2004. [Online]. Available: http://emotion-research.net/ws/wp3/
5. A. Ortony, “On making believable emotional agents believable,” in Emotions in Humans and Artifacts, R. Trappl, P. Petta, and S. Payr, Eds. Cambridge: MIT Press, 2003, pp. 189–212.