V. Majuntke, G. Schiele, K. Spohrer, M. Handte, and C. Becker. Proceedings of the Sixth International Conference on Intelligent Environments (IE 2010), Kuala Lumpur, Malaysia, page 178--184. Los Alamitos, CA, IEEE Computer Society CPS, (2010)
S. Germesin, and T. Wilson. Proceedings of the 11th International Conference on Multimodal Interfaces and the 6th Workshop on Machine Learning for Multimodal Interfaces (ICMI-MLMI '09), Cambridge, MA, USA, page 7-14. (2009)
A. Ndiaye, P. Gebhard, M. Kipp, M. Klesen, M. Schneider, and W. Wahlster. Intelligent Technologies for Interactive Entertainment: First International Conference, INTETAIN 2005, Madonna di Campiglio, Italy, volume 3814 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2005)