1. Features of similarity.
2. and , “Generic tasks for knowledge-based reasoning: the right level of abstraction for knowledge acquisition,” In Knowledge Acquisition for Knowledge-Based Systems, and Eds., Academic Press, New York, 1988, pp. 65–77.
3. and , “A fundamental tradeoff in knowledge representation and reasoning,” In Readings in Knowledge Representation, and , Eds., (Morgan Kaufmann, CA, 1985), pp. 42–70.