Bibliografia

1. Geyer H, Parr MK, Koehler K, Mareck U, Schanzer W, Trevis M. Nutritional supplements cross-contaminated and faked with doping substances. J Mass Spectrom 2008; 43: 892-902.

2. Geyer H, Parr MK, Mareck U, Reinhart U, Schrader Y, Schanzer W. Analysis of non-hormonal nutritional supplements for anabolic-androgenic steroids. Results of an International study. Int j Sports Med 2004; 25: 124-9.