1. Wadler G, Hainline B. Drugs and the Athlete. Philadelphia: FA Davis Co.; 1989.
2. Spiegel D. Yet another cycling confession: Tour de France victor Riis admits to doping. In: SPIEGEL ONLINE. 2007.
3. Cunningham S. I was a cheat, a bully and I told one BIG LIE—cocky Armstrong shows no remorse as he answers Oprah's questions. The Daily Mail; 2013.
4. Cycling-News. Michael Rasmussen confesses to 12 years of doping. In: Cyclingnews.com. 2013.
5. Cycling-News. Doping was a way of life at Rabobank, says Thomas Dekker. 2013.