B. Vogel, D. Spikol, A. Kurti, and M. Milrad. Proceedings of the 2010 6th IEEE International Conference on Wireless, Mobile, and Ubiquitous Technologies in Education, page 65--72. Washington, DC, USA, IEEE Computer Society, (2010)
L. Gaye, R. a\copyright, and L. Holmquist. NIME '03: Proceedings of the 2003 Conference on New Interfaces for Musical Expression, Singapore, National University of Singapore, (2003)
S. Diewald, L. Roalter, A. Möller, and M. Kranz. Proceedings of the 10th International Conference on Mobile and Ubiquitous Multimedia, page 73--80. New York, NY, USA, ACM, (December 2011)
A. Jameson, and K. Klöckner. Spoken Multimodal Human-Computer Dialogue in Mobile Environments, volume 28 of Text, Speech and Language Technology, chapter 19, Springer-Verlag, Berlin/Heidelberg, (2005)