1. Brachman, R. J. & Levesque, H. J. (eds.). Readings in knowledge representation. Morgan Kaufmann Publishers Inc. (1985)
2. Brown, J. S., & Burton, R. R. Diagnostic models for procedural bugs in basic mathematical skills. Cognitive science (1978)
3. Brown, J. S. Towards a new epistemology for learning. Intelligent tutoring systems at the crossroads of AI and education. Frasson, C. & Gauthiar, J. (eds.), Norwood NJ, Ablex (1989)
4. Burton, R. R. Diagnosing bugs in a simple procedural skill. Intelligent tutoring systems. Sleeman, D. & Brown, J.S. (eds) (1982)
5. Cerri, S. A., ALICE: Acquisition of linguistic items in the context of examples. Instructional science, 18, pp. 63–92, (1989)