D. Traum, and S. Larsson. chapter The Information State Approach to Dialogue Modelling, page 15--27. University of Goeteburg, Department of Linguistics, Goeteburg University, (2001)
J. Tash, and S. Russell. Proceedings of the Twelfth National Conference on Artificial Intelligence
(AAAI-94), 2, page 1079--1085. Seattle, Washington, USA, AAAI Press/MIT Press, (1994)
R. Srikant, and R. Agrawal. VLDB '95: Proceedings of the 21th International Conference on Very
Large Data Bases, page 407--419. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (1995)
R. Srikant, and R. Agrawal. EDBT '96: Proceedings of the 5th International Conference on Extending
Database Technology, page 3--17. London, UK, Springer-Verlag, (1996)
D. Sonntag, and P. Heim. Second International Conference on Semantics and digital Media Technology
(SAMT), volume 4816 of Lecture Notes in Computer Science, Springer, (2007)