1. Chosunilbo (2011, July 14). Number of Smartphone Users Hits 15 Million. The Chosunilbo. Retrieved from http://english.chosun.com/site/data/html_dir/2011/07/14/2011071400608.html
2. Informal learning with PDAs and smartphones
3. Weblogs – are you serious?
4. Fingas, J. (2012, May 7). Nielsen: Over 50 percent of US mobile device users own smartphones, Android, and iPhone sitting pretty. Engadget. Retrieved from http://www.engadget.com/2012/05/07/nielsen-smartphone-share-march-2012/