A. Balali Moghaddam, J. Svendsen, M. Tory, and A. Branzan Albu. Proceedings of the 2011 annual conference extended abstracts on Human factors in computing systems, page 2347--2352. New York, NY, USA, ACM, (2011)
A. Roudaut. Proceedings of the 27th international conference extended abstracts on Human factors in computing systems, page 3153--3156. New York, NY, USA, ACM, (2009)
E. Rukzio, K. Leichtenstern, and V. Callaghan. 8th International Conference on Ubiquitous Computing, UbiComp 2006, Orange County, California, (September 2006)
C. Scholliers, L. Hoste, B. Signer, and W. De Meuter. Proceedings of the Fifth International Conference on Tangible, Embedded, and Embodied Interaction, page 49--56. New York, NY, USA, ACM, (2011)