1. Sperber D, Wilson D (1986) Relevance: communication and cognition. Harvard University Press, Cambridge
2. Medin DL, Coley JD, Storms G, Hayes BK (2003) A relevance theory of induction. Psychon Bull Rev 10(3):517–532
3. Minsky M (1974) A framework for representing knowledge. In: P.H.Winston (Ed) The psychology of computer vision. McGraw-Hill Book, New York
4. Bisson G (1992) Conceptual clustering in a first order logic representation. Citeseer, Princeton
5. Beckert B (2004) Introduction to artificial intelligence. First-order logic