N. Pfleger, J. Alexandersson, and T. Becker. Proceedings of IJCAI-03 Third Workshop on Knowledge and Reasoning in Practical Dialogue System, Acapulco, Mexico, (2003)
D. Costa, and C. Duarte. Universal Access in Human-Computer Interaction: Design for All and eInclusion, 6th International Conference, UAHCI 2011, Held as Part of HCI International 2011, Orlando, FL, USA, volume 6765 of Lecture Notes in Computer Science, Springer, Heidelberg, (2011)
P. Gebhard. Proceedings of the Fourth International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS '05), Utrecht, The Netherlands, page 29--36. New York, ACM, (2005)
Z. Cherif, A. Nait-Ali, J. Motsch, and M. Krebs. Proceedings of the19th IEEE Instrumentation and Measurement Technology Conference (IMTC 2002), Anchorage, AK, USA, 2, page 1029--1033. (2002)
D. del Valle-Agudo, J. Calle-Gómez, D. Cuadra-Fernández, and J. Rivero-Espinosa. Human-Computer Interaction: Novel Interaction Methods and Techniques, 13th International Conference, HCI International 2009, San Diego, CA, USA, Proceedings, Part II, volume 5611 of Lecture Notes in Computer Science, Springer, Berlin, (2009)