1. Lesser, V., J. Pavlin, and E. Durfee. 1988. Approximate processing in real-time problem solving.AI Magazine, 9:49–61, (Spring).
2. Simon, H.A. 1969.The Sciences of the Artificial. Cambridge, MA: MIT Press.
3. Boddy, M., and T. Dean. 1989. Solving time-dependent planning problems. InProceedings of the Eleventh International Joint Conference on Artificial Intelligence, (Aug.)
4. Kanazawa, K., and T. Dean. 1989. A model for projection and action. InProceedings of the Eleventh International Joint Conference on Artificial Intelligence, (Aug.).
5. Horvitz, E.J. 1988. Reasoning under varying and uncertain resource constraints. InProceedings of the Seventh National Conference on Artificial Intelligence, (Aug.).