M. Pucher, F. Neubarth, and D. Schabus. Proceedings of the 12th international conference on Computers helping people with special needs (ICCHP), page 361-366. Vienna, Austria, (July 2010)
D. Sonntag, R. Neßelrath, G. Sonnenberg, and G. Herzog. Paper presented at the First International Workshop on Spoken Dialogue Systems Technology (IWSDS-2009), Kloster Irsee, Germany, (December 2009)Available from http://www.dfki.de/web/forschung/publikationen?pubid=4673.
D. Sonntag, and M. Möller. Proceedings of the International Conference on Knowledge Management and Information Sharing (KMIS), Madeira, Portugal, (2009)