M. Schneider, M. Velten, and J. Haupert. Proceedings of the Sixth International Conference on Intelligent Environments (IE 2010), Kuala Lumpur, Malaysia, page 122-127. Los Alamitos, CA, IEEE Computer Society CPS, (2010)
M. Schneider, and A. Kröner. Proceedings of the 4th IET International Conference on Intelligent Environments (IE 08), Seattle, WA, USA, Institution of Engineering and Technology (IET), London, (2008)
C. Elting, S. Rapp, G. Möhler, and M. Strube. Proceedings of the 5th International Conference on Multimodal Interfaces (ICMI '03), Vancouver, Canada, page 93-100. (2003)