B. Jones, H. Benko, E. Ofek, and A. Wilson. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13), Paris, France, page 869--878. New York, ACM, (2013)
D. Kosmopoulos, P. Doliotis, V. Athitsos, and I. Maglogiannis. Distributed, Ambient, and Pervasive Interactions: Proc.\ of the First International Conference (DAPI 2013), Las Vegas, NV, USA, 8028, Springer, Heidelberg, (2013)
H. Seidel. Informatik 2009: Im Focus das Leben, Beiträge der 39. Jahrestagung der Gesellschaft für Informatik e.V. (GI), volume P-154 of GI Edition: Lecture Notes in Informatics (LNI) -- Proceedings, page 5--14. Bonn, Gesellschaft für Informatik, (2009)