1. Kang, J.-m., Lee, W.-J., Song, Y.-J.: A study for vulnerability analysis and guideline about social personal broadcasting service based on smartphone environment (focus on SNS or U-Health). The Journal of the Institute of Webcasting, Internet and Telecommunication 10(6), 162 (2010)
2. Kang, J.-m.: New Media and Politics of Communication, p. 15. Hanwool, Seoul (2009)
3. Yonhap News, Seven million smartphones in the market... grew by 8.5 times year-on-year (December 5, 2010), http://finance.daum.net/news/finance/world/MD20101205062206411.daum (search date: December 2010)
4. ATLAS Mobile Index, http://www.itconference.co.kr/142129 (search date: February 2011)
5. Lee, S.Y.: Smartphone, Now, Mobile Platform Trends, 23/48slides (2010), http://www.slideshare.net/bluse2/smartphone-platform-trend;