1. Markovitch, S. & Scott, P. D., Information Filtering. Selection mechanisms in Learning Systems. Machine Learning, 10, 113–151, (1993).
2. Minton, S., Qualitative Results Concerning the Utility of Explanation-Based Learning. Artificial Intelligence, 42, 363–391, (1990).
3. Tambe, N., Newell, A., and Rosenbloom, P. S., The Problem of Expensive Chunks and is Solution by Restricting Expressiveness. Machine Learning, 5, 299–349, (1990).
4. CMU-CS-92-174;M. Veloso,1992
5. Liu, B., Choo, S. H., Lok, S. L., Leong, S. M., Lee, S. C., Poon, F. P., and Tan, H. H., Finding the Shortest Route Using Cases, Knowledge, and Dijkstra's Algorithm. IEEE Expert, 9(5), 7–11, (1994).