1. Bolc, L., Coombs, M.J.: Expert System Applications. Springer (1988)
2. De Angeli, A.: To the rescue of a lost identity: Social perception in human-chatterbot interaction. In: Virtual Agents Symposium, pp. 7–14 (2005)
3. Galambos, L.: Stempel (2004),
http://www.getopt.org/stempel/
4. Ignizio, J.P.: An introduction to Expert Systems. McGraw-Hill (1991)
5. Jackson, P.: Introduction to Expert Systems. Addison Wesley (1999)