J. Schehl, A. Pfalzgraf, N. Pfleger, and J. Steigner. Proceedings of the 10th international conference on Multimodal interfaces, page 77--80. New York, NY, USA, ACM, (2008)
D. Sonntag, and M. Möller. Proceedings of the 15th international conference on Intelligent user interfaces, page 381--384. New York, NY, USA, ACM, (2010)
D. Porta, D. Sonntag, and R. Neßelrath. Proceedings of the 4th Workshop on Speech in Mobile and Pervasive Environments (SiMPE '09) in conjunction with MobileHCI '09, ACM, (2009)
D. Sonntag, M. Deru, and S. Bergweiler. Proceedings of the 2009 International Conference on Artificial Intelligence, ICAI 2009, July 13-16, 2009, Las Vegas Nevada, USA, 2 Volumes, page 974--979. (2009)
A. Nguyen, and W. Wobcke. Proceedings of the 10th international conference on Intelligent user interfaces, page 137--144. New York, NY, USA, ACM, (2005)
T. Heinroth, D. Denich, and W. Minker. Universal Access in Human-Computer Interaction. Applications and Services, volume 6768 of Lecture Notes in Computer Science, chapter 5, Springer-Verlag, Berlin/Heidelberg, (2011)