1. Allen, J.F.: Towards a general theory of action and time. Artificial Intelligence, 123–154 (1984)
2. FIFA. Laws of the game. Fédération Internationale de Football Association, FIFA House, 11 Hitzigweg, 8030 Zurich, Schweiz (July 2002)
3. Frank, I., Tanaka-Ishi, K., Arai, K., Matsubara, H.: The statistics proxy server. In: Balch, T., Stone, P., Kraetschmar, G. (eds.) 4th International Workshop on RoboCup, pp. 199–204. Carnegie Mellum University Press, Melbourne (2000)
4. Freksa, C.: Temporal reasoning based on semi-intervals. Artificial Intelligence 54(1), 199–227 (1992)
5. Lecture Notes in Computer Science;D. Hernández,1995