C. Schulz, J. Alexandersson, and T. Becker. Proceedings of the Eight International Conference on Computational Semantics, Tilburg, The Netherlands, page 320-325. (2009)
S. Oviatt, A. De Angeli, and K. Kuhn. Proceedings of ACL/EACL-97 SIGMEDIA Workshop on Referring Phenomena in a Multimedia Context and their Computational Treatment, Madrid, Spain, (1997)
R. Catizone, A. Setzer, and Y. Wilks. Proceedings of the EACL 2003 Workshop on Dialogue Systems: Interaction, Adaptation, and Styles of Management, Budapest, Hungary, (2003)