1. Tsapatsoulis N, Raousaiou A, Kollias S, Cowie R, Douglas-Cowie E (2002) Emotion recognition and synthesis based on MPEG-4 FAPs MPEG-4 facial animation—the standard implementations applications. Wiley, Hillsdale, pp 141–167
2. André E, Dybkyaer L, Minker W, Heisterkamp P (eds) (2004) In: Proceedings of the tutorial and research workshop on affective dialogue systems (ADS04), vol 3068 of lecture notes in artificial intelligence, Kloster Irsee, Germany. Springer, Berlin Heidelberg New York
3. Cowie R, Cornelius R (2003) Describing the emotional states that are expressed in speech. Speech Commun Spec Issue Speech Emotion 40(1–2):5–32
4. Scherer K (2000) Psychological models of emotion. Neuropsychology of emotion. Oxford University Press, Oxford, pp 137–162
5. The HUMAINE network portal. http://emotion-research.net