1. Anti Doping Denmark, Dopingautoriteit, STAD, Instytut Sportu and CyADA. (2012). Strategy for stopping steroids. Retrieved from http://www.antydoping.pl/upload/2012/strategy_for_stopping_steroids_report_web.pdf
2. Ashenden, M., Gough, C., Garnham, A., Gore, C., & Sharpe, K. (2011). Current markers of the Athlete Blood Passport do not flag microdose EPO doping. European Journal of Applied Physiology, 111(9), 2307–2314.
3. Backhouse, S., McKenna, J., Robinson, S., & Atkin, A. (2007). International literature review: Attitudes, behaviours, knowledge and education—Drugs in sport: Past, present and future. Retrieved from http://www.wada-ama.org/rtecontent/document/Backhouse_et_al_Full_Report.pdf
4. Baker, J. S., Graham, M., & Davies, B. (2006). Gym users and abuse of prescription drugs. Journal of the Royal Society of Medicine, 99, 331–333.
5. BBC. (2009). Boonen banned from Tour de France. Retrieved from http://news.bbc.co.uk/sport2/hi/other_sports/cycling/8041462.stm