1. Pro-smoking apps for smartphones: the latest vehicle for the tobacco industry? Tobacco Control;BinDhim
2. Android official blog. Google Play hits 25 billion downloads. 2012. [8 October 2012]. http://officialandroid.blogspot.com.au/2012/09/google-play-hits-25-billion-downloads.html
3. The official Google blog. 10 billion Android Market downloads and counting. 2011 [20 November 2012]. http://googleblog.blogspot.com.au/2011/12/10-billion-android-market-downloads-and.html
4. Spriensma GJ . Quora answering series: download volume needed to hit top 25 per category. Distimo. 2012. http://www.distimo.com/blog/2012_05_quora-answering-series-download-volume-needed-to-hit-Top 25-per-category/
5. Spriensma GJ . Quoraansweringseries: download volume needed to hit the top charts. Distimo. 2012. http://www.distimo.com/blog/2011_12_quora-answering-series-download-volume-needed-to-hit-the-top-charts/