[4] “Use of doping agents, in particular anabolic steroids, in sports and society”. Sjöqvist F, Garle M, Rane A (May 2008). Lancet 371 (9627): 1872–82. doi:10.1016/S0140-6736(08)60801-6. PMID 18514731.
[5] “Anabolic-androgenic steroid use in the United States”.Yesalis CE, Kennedy NJ, Kopstein AN, Bahrke MS (1993). JAMA 270 (10): 1217–21. doi:10.1001/jama.270.10.1217. PMID 8355384.”
[6] A league of their own: demographics, motivations and patterns of use of 1,955 male adult non-medical anabolic steroid users in the United States. Cohen, J.; Collins, R.; Darkes, J.; Gwartney, D. (2007). Feedback 4: 12. doi:10.1186/1550-2783-4-12. PMC 2131752. PMID 17931410. //www.ncbi.nlm.nih.gov/pmc/articles/PMC2131752/.
[7] Anabolic Androgenic Steroids: A Survey of 500 Users. Andrew B. Parkinson, Nick A. Evans. Med Sci Sports Exerc. 2006;38(4):644-651.