N. Broy, M. Nefzger, F. Alt, M. Hassib, and A. Schmidt. Human-Computer Interaction - INTERACT 2015 - 15th IFIP TC 13
International Conference, Bamberg, Germany, September 14-18, 2015,
Proceedings, Part IV, volume 9299 of Lecture Notes in Computer Science, page 300--318. Springer, (2015)