1. Cassell, J.: Embodied conversational interface agents. Communications of ACM 43, 70–78 (2000)
2. Takeuchi, Y., Katagiri, Y.: Social Character Design for Animated Agents. In: ROMAN 1999 (1999)
3. Reeves, B., Nass, C.: The media Equation: how people treat computers, televisions and new media like real people and places. Cambridge University Press, Cambridge (1996)
4. Coupland, J., Coupland, N., et al.: How are you?: Negotiating phatic communion, Language in Society 21, 207–230.
5. Schneider, K.P.: Small Talk: Analysing Phatic Discourse. Marburg, Hetzeroth (1988)