D. Chan, R. Luk, H. Leong, und E. Ho. Proceedings of the Symposium on Human Interface 2009 on Human Interface and the Management of Information. Information and Interaction. Part II: Held as part of HCI International 2009, Seite 365–374. Berlin, Heidelberg, Springer-Verlag, (2009)
A. Tsiaousis, und G. Giaglis. Mobile Business / Global Mobility Roundtable, International Conference on, 0, Seite 161--167. Los Alamitos, CA, USA, IEEE Computer Society, (2010)
G. Schmiedl, M. Seidl, und K. Temper. Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services, Seite 1--2. Bonn, Germany, ACM, (2009)