1. Wooldridge, M.: An Introduction to MultiAgent Systems. John Wiley & Sons, West Sussex (2002)
2. Lee, I.: Fast Qualitative Reasoning about Categories in Conceptual Spaces. In: Abraham, A., Köppen, M., Franke, K. (eds.) Proc. of the 3rd Int. Conf. on Hybrid Intelligent Systems, Melbourne, Australia, pp. 341–350. IOS Press, Amsterdam (2003)
3. Gärdenfors, P.: Conceptual Spaces: The Geometry of Thought. The MIT Press, Cambridge (2000)
4. Lecture Notes in Artificial Intelligence;A. Chella,2000
5. Lecture Notes in Artificial Intelligence;A. Chella,2001