A. Wehbi, M. Hina, A. Zaguia, A. Ramdane-Cherif, and C. Tadj. Toward Useful Services for Elderly and People with Disabilities: 9th International Conference on Smart Homes and Health Telematics, ICOST 2011, Montreal, Canada, (2011)
L. Vanacken, J. De Boeck, C. Raymaekers, and K. Coninx. Proceedings of the 10th International Conference on Multimodal Interfaces (ICMI '08), Chania, Crete, Greece, page 129-136. (2008)