R. Pieraccini, and J. Huerta. Recent Trends in Discourse and Dialogue, volume 39 of Text, Speech and Language Technology, chapter 1, Springer, Dordrecht, (2008)
R. Vilimek, T. Hempel, and B. Otto. Human-Computer Interaction: HCI Intelligent Multimodal Interaction Environments, 12th International Conference, HCI International 2007, Beijing, China, Proceedings, Part III, volume 4552 of Lecture Notes in Computer Science, Springer, Berlin, (2007)
P. Lucey, G. Potamianos, and S. Sridharan. Proceedings of AVSP'07: International Conference on Auditory-Visual Speech Processing, Kasteel Groenendaal, Hilvarenbeek, The Netherlands, (2007)
K. Kumatani, and R. Stiefelhagen. Proceedings of ICASSP'07: IEEE International Conference on Acoustics, Speech and Signal Processing, Honolulu, Hawaii, USA, 4, page 417-420. (2007)
A. Batliner, C. Hacker, M. Kaiser, H. Mögele, and E. Nöth. Proceedings of AVSP'07: International Conference on Auditory-Visual Speech Processing, Kasteel Groenendaal, Hilvarenbeek, The Netherlands, (2007)