M. Aehnelt, H. Diener, and A. Müller. Tagungsband 10.~Fachtagung Digital Engineering zum Planen, Testen und Betreiben technischer Systeme, 16.~IFF-Wissenschaftstage, page 139--146. Magdeburg, Fraunhofer-Institut für Fabrikbetrieb und -Automatisierung (IFF), (June 2013)
M. Aehnelt, H. Schulz, and B. Urban. Advances in Visual Computing: 9th International Symposium, ISVC 2013, Rethymnon, Crete, Greece, Proceedings, Part II, volume 8034 of Lecture Notes in Computer Science, Springer, Berlin, (2013)
J. Allen, G. Ferguson, and A. Stent. Proceedings of IUI '01: 6th International Conference on Intelligent User Interfaces, Santa Fe, NM, USA, page 1-8. (2001)
M. Araki, and Y. Funakura. Spoken Dialogue Systems for Ambient Environments: Second International Workshop, IWSDS 2010, Gotemba, Shizuoka, Japan, volume 6392 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2010)