P. Klante, J. Krösche, and S. Boll. Computers Helping People with Special Needs, volume 3118 of Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2004)
G. Biegel, and V. Cahill. Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04), page 361--. Washington, DC, USA, IEEE Computer Society, (2004)
R. Ballagas, F. Memon, R. Reiners, and J. Borchers. Proceedings of the SIGCHI conference on Human factors in computing systems, page 1107--1116. New York, NY, USA, ACM, (2007)