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G. Di Fabbrizio, J. Wilpon, and T. Okken. 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 71-78. (2009)
R. Kawase, G. Papadakis, E. Herder, and W. Nejdl. Proc. of 22nd ACM conference on Hyptertext and Hypermedia (HT), June 2011, Eindhoven, The Netherlands., (2011)
D. Sonntag, D. Porta, and J. Setz. Proceedings of the 4nd International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies (UBICOMM-10), page 170-175. IARIA/XPS (Xpert Publishing Services), (October 2010)
G. Di Fabbrizio, T. Okken, and J. Wilpon. Proceedings of the 2009 international conference on Multimodal interfaces, page 71--78. New York, NY, USA, ACM, (2009)
J. Schulte. Proceedings of the 13th International Conference on Enterprise Information Systems, 4, page 348-357. Beijing, China, INSTICC, SciTePress - Science and Technology Publications, (June 2011)