1. Banerji, R. (1969) Theory of Problem Solving, American Elsevier, New York
2. Barr, A., Feigenbaum, E. (eds), (1981) The Handbook of Artificial Intelligence Volume I, William Kaufmann Inc., Los Altos, CA
3. Fischler, M.; Firschein, O. (1987) Intelligence the Brain, the Eye, and the Computer, Addison-Wesley, Reading, MA
4. Charniak, E.; McDermott, D. (1986) Introduction to Artificial Intelligence, Addison-Wesley, Reading, MA
5. Hayes-Roth, F.; Waterman, D.; Lenat, D. (eds.) (1983) Building Expert Systems, Addison-Wesley, Reading, MA