R. Ballagas, M. Rohs, and J. Sheridan. CHI '05 extended abstracts on Human factors in computing systems, page 1200--1203. New York, NY, USA, ACM, (2005)
M. Jokisch, T. Bartoschek, and A. Schwering. Human-Computer Interaction, volume 6762 of Lecture Notes in Computer Science, page 71--80. Springer, (2011)