1. Lai, X., Hu, S.: A Theoretical Framework of Rational and Emotional Agent for Ubiquitous Computing. In: 16th International Conference on Artificial Reality and Telexistence-Workshops, ICAT 2006 (2006)
2. Ochs, M., Pelachaud, C., Sadek, D.: Emotion Elicitation in an Empathic Virtual Dialog Agent. In: European Cognitive Science Conference, Delphi, Greece (2007)
3. Klein, J., Moon, Y., Picard, R.: This computer responds to user frustration. In: Conference on Human Factors in Computing Systems. ACM Press, New York (1999)
4. Partala, T., Surakka, V.: The effects of affective interventions in human-computer interaction. I. with Comp. 16, 295–309 (2004)
5. Prendinger, H., Mori, J., Ishizuka, M.: Using human physiology to evaluate subtle expressivity of a virtual quizmaster in a mathematical game. I. J. of H. Com. Stud. 62, 231–245 (2005)