M. Blumendorf, G. Lehmann, and S. Albayrak. Proceedings of the 2nd ACM SIGCHI symposium on Engineering interactive computing systems, page 9--18. New York, NY, USA, ACM, (2010)
T. Heinroth, D. Denich, and W. Minker. Universal Access in Human-Computer Interaction. Applications and Services, volume 6768 of Lecture Notes in Computer Science, chapter 5, Springer-Verlag, Berlin/Heidelberg, (2011)