1. Gartner Says Mobile Phone Sales Will Exceed One Billion in 2009, http://www.gartner.com/press_releases/asset_132473_11.html.
2. Smart phone sales to reach 126 m units by 2009, ARC Group, 15 November, 2004.
3. http://www.strategicanalytics.com.
4. http://www.informationweek.com/story/showArticle.jhtml?articleID=53701337, Mobile Pipeline News, Nov. 22, 2004.
5. http://store.infotrendsresearch.com/ProductDetails.asp?ProductCode=65326, Worldwide Camera Phone and Photo Messaging Forecast: 2004–2009.