D. Sonntag, and M. Möller. Proceedings of IUI '10: 15th International Conference on Intelligent User Interfaces, Hong Kong, China, page 381-384. (2010)
D. Sonntag, and M. Möller. Proceedings of the International Conference on Knowledge Management and Information Sharing (KMIS), Madeira, Portugal, (2009)
G. Skantze, and A. Hjalmarsson. Proceedings of the 11th Annual Meeting of the Special Interest Group on Discourse and Dialogue (SIGdial 2010), Tokyo, Japan, page 1-8. (2010)
C. Schulz, J. Alexandersson, and T. Becker. Proceedings of the Eight International Conference on Computational Semantics, Tilburg, The Netherlands, page 320-325. (2009)