Allen, J. F. (1991). Time and time again. **International Journal of Intelligent Systems**,
6**(4), 341–355.**
Altmann, E. M., & Gray, W. D. (2002). Forgetting to remember: **The functional relationship**
of decay and interference. Psychological Science, 13**, 27–33.**
Bresina, J., Drummond, M., & Kedar, S. (1993). Reactive, integrated systems pose new problems for machine learning. In Minton, S. (Ed.), **Machine Learning Methods for** Planning**, pp. 159–195. Morgan Kaufmann, San Francisco, CA.**
Dechter, R. (1990). Enhancement schemes for constraint processing: Backjumping, learning and cutset decomposition. Artificial Intelligence, 41**, 273–312.**
Doyle, J. (1979). A truth maintenance system. Artificial Intelligence, 12**, 231–272.** Doyle, J. (1994). Reason maintenance and belief revision. In G¨ardenfors, P. (Ed.), **Belief**
Revision**, pp. 29–51. Cambridge University Press, Cambridge, UK.**
Eiter, T., & Gottlob, G. (1992). On the complexity of propositional knowledge base revision, updates, and counterfactuals. Artificial Intelligence, 57**, 227–270.**
Erol, K., Hendler, J., & Nau, D. S. (1994). HTN planning: Complexity and expressivity. In Proceedings of the 12th National Conference on Artificial Intelligence**, pp. 1123–1128.**
Firby, R. J. (1987). An investigation into reactive planning in complex domains. In Proceedings of the 6th National Conference on Artificial Intelligence**, pp. 202–206.**
Forbus, K. D., & deKleer, J. (1993). Building Problem Solvers**. MIT Press, Cambridge,**
MA.

Forgy, C. L. (1979). On the Efficient Implementation of Production Systems**. Ph.D. thesis,**
Computer Science Department, Carnegie-Mellon University.

G¨ardenfors, P. (1988). **Knowledge in Flux: Modeling the Dynamics of Epistemic States**.

MIT Press, Cambridge, MA.

G¨ardenfors, P. (1992). Belief revision. In Pettorossi, A. (Ed.), **Meta-Programming in Logic**.

Springer-Verlag, Berlin, Germany.

Gaschnig, J. (1979). Performance measurement and analysis **of certain search algorithms.**
Tech. rep. CMU-CS-79-124, Computer Science Department, Carnegie-Mellon University, Pittsburgh, Pennsylvania.

Gat, E. (1991a). Integrating planning and reacting in a heterogeneous asynchronous architecture for mobile robots. SIGART BULLETIN, 2**, 71–74.**
Gat, E. (1991b). Reliable, Goal-directed Control of Autonomous Mobile Robots**. Ph.D.**
thesis, Virginia Polytechnic Institute and State University, Blacksburg, VA.

Georgeff, M., & Lansky, A. L. (1987). Reactive reasoning and planning. In **Proceedings of**
the 6th National Conference on Artificial Intelligence**, pp. 677–682.**
Graham, J., & Decker, K. (2000). Towards a distributed, environment-centered agent framework. In Wooldridge, M., & Lesperance, Y. (Eds.), Lecture Notes in Artificial Intelligence: Agent Theories, Architectures, and Languages VI (ATAL-99)**. Springer-Verlag,**
Berlin.