References
- O'Hear , A. 2006 . Drugs in sport: A philosophical challenge . Philosophy , 81 ( 318 ) : 559 – 560 .
- Nature . 2007 . Editorial: A sporting chance . Nature , 448 ( 2 ) : 512
- Singer , P. 2007 . “ Is doping wrong?' ” . Available at http://www.project-syndicate.org/commentary/singer27/English, accessed 6 Sept. 2007