1. Ginsberg, A.: Automatic Refinement of Expert System Knowledge Bases. Morgan Kaufmann, San Francisco (1988)
2. Carbonara, L., Sleeman, D.: Effective and Efficient Knowledge Base Refinement. Machine Learning 37, 143–181 (1999)
3. Boswell, R., Craw, S.: Organizing Knowledge Refinement Operators. In: Validation and Verification of Knowledge Based Systems, pp. 149–161. Kluwer, Oslo (1999)
4. Knauf, R., Philippow, I., Jantke, K.P., Gonzalez, A., Salecker, D.: System Refinement in Practice – Using a Formal Method to Modify Real-Life Knowledge. In: Proceedings of the 15th International Florida Artificial Intelligence Research Society Conference (FLAIRS 2002). AAAI Press, Menlo Park (2002)
5. Lecture Notes in Computer Science;S. Wrobel,1997