1. Belnap, N.D., Steel, T.B.: The Logic of Questions and Answers. Yale University Press (1976)
2. Baral, C., Son, T.: Formalizing sensing actions–a transition function based approach. Artificial Intelligence 125(1-2), 19–91 (2001)
3. Etzioni, O., Hanks, S., Weld, D., Draper, D., Lesh, N., Williamson, M.: An approach to planning with incomplete information. In: Proceedings of Knowledge Representation, pp. 115–125 (1992)
4. Fagin, R., Halpern, J., Moses, Y., Vardi, M.: Reasoning about Knowledge. MIT Press, Cambridge (1995)
5. Golden, R.P., Boddy, M.S.: Expressive planning and explicit knowledge. In: Proceedings of the Third Artificial Intelligence Planning Systems, pp. 110–117 (1996)