1. Aamodt, A. and Plaza, E., (1994). Case-Based Reasoning: Foundational Issues, Methodological Variations, and System Approaches. AI Communications, Vol. 7, No 1, pp 39–59.
2. Bundy, A., (1992). Tutorial notes: reasoning about logic programs. Second International Logic Programming Summer School, LPSS '92. Proceedings, pp. 252–77, Comyn G., Fuchs N.E., & Ratcliffe M.J. (eds.), Springer-Verlag.
3. Dalianis H. and Hovy E. (1993). Aggregation in Natural Language Generation, The Fourth European Workshop on Natural Language Generation, Proceedings, Pisa, Italy.
4. Davis, E., (1990). Representations of Commonsense Knowledge, chapters 2 and 3. Morgan Kaufmann.
5. Echarti, J. P. and Stålmarck, G., (1988). A logical framework for specifying discrete dynamic systems, Technical Report, Ellemtel Telecommunication Systems Laboratories.