1. Towards a general theory of action and time
2. Allen, J. F. and Hayes, P. J. 1985. “A common-sense theory of lime. Proc. of the 9th Inter. Joint Conference on Artificial Intelligence (IJCAI-85), 528–531”.
3. Bach, E. 1981. Edited by: Cole, P. 63–81. New York: Academic Press. On time, tense, and aspect: an essay in English metaphysics. In: Radical Pragmatics
4. Dowty, D. 1979. “Word Meaning and Montague Grammar. Reidel, Dordrecht”.
5. Hamblin, C. L. 1972. Edited by: Fraser, J. T. 325–331. New York: Springer-Verlag. Instants and intervals. In: The Study of Time