1. Barber, F.: Time-dependent experts-systems: A model for representation and reasoning. PhD. Thesis. Dpt. Sistemas Informâticos y Computacidn. Univ. Politécnica of Valencia. 1990.
2. Fikes, E.E. and Nilsson, N.J.: Strips: A new approach to the application of theorem proving the problem solving. Artificial Intelligence 26. 1971.
3. Hubert, A. and Becker, S.: Production planning using a temporal planning component Procc. of ECAI-88 Munchen. pp.182–185.
4. Isermann, R. (Ed.): Procc. of the 10th world congress on automatic control. IFAC-7. vo.6. 1987.
5. Laffey, T.L., Coxx, P. A., Schmitdt, J.L., Kao, S.M., and Read, J.Y.: Real-time knowledge-based systems. AI Magazine. Spring 1988.