M. Khan. University of Kassel, Fachbereich 16: Elektrotechnik/Informatik, Distributed Systems Group, Wilhelmshöher Allee 73, 34121 Kassel, Germany, (March 2010)
L. Aalto, N. Göthlin, J. Korhonen, and T. Ojala. MobiSys '04: Proceedings of the 2nd international conference on Mobile systems, applications, and services, page 49--58. New York, NY, USA, ACM Press, (2004)
B. Ringbauer, R. Kniewel, and C. Hipp. Usability Professionals 2009 : Berichtband des siebten Workshops des German Chapters der Usability Professionals Association e.V, 06.09.-09.09.2009 an der Humboldt-Universität zu Berlin, page 18-22. Stuttgart, Fraunhofer IRB Verlag, (2009)
N. Pattan, and D. Madamanchi. Mobile Computing, Applications, and Services, volume 35 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, Springer Berlin Heidelberg, 10.1007/978-3-642-12607-9_21.(2010)