Nearly two-thirds of Americans now own a smartphone. 19% of Americans rely to some extent on a smartphone for internet access, but the connections to digital
V. Kamtsiou, T. Koskinen, A. Naeve, и L. Stergioulas. Proceedings of the First European Conference on Technology Enhanced Learning EC-TEL'06,, Springer LNCS, Crete, Greece, (октября 2006)
J. Hoernecke, M. Amelung, K. Krieger, и D. Rösner. DeLFI 2011 - Die 9. e-Learning Fachtagung Informatik der Gesellschaft für Informatik e.V., 5.-8. September 2011, Technische Universität Dresden, том 188 из LNI, стр. 127--138. Bonn, GI, (2011)