1. Balachandran, M.: 1988, A Model for Knowledge-based Design Optimization, a PhD. thesis, Key Centre of Design Computing and Cognition, University of Sydney, Sydney, Australia.
2. Bisbey, P.R. and G.P. Trajkovski, 2005, “Rethinking Concept Formation for Cognitive Agents”, Towson University, Towson, MD.
3. Clancey, W., 1997, Situated Cognition, Cambridge University Press, Cambridge.
4. Clancey, W., 1999, Conceptual Coordination: How the Mind Orders Experience in Time, Lawrence Erlbaum Associates, New Jersey.
5. Fisher, D.H. and M. Pizzani, 1991, “Computational models of concept learning”, in: Fisher, Pazzani and Langley (eds.) Concept formation: Knowledge and Experience in Unsupervised Learning, Morgan Kaufmann, San Mateo, CA, p. 3–43.