1. 1. United Nations Office on Drugs and Crime. Global Illicit Drug Trends. 2001. Available at: http://www.unodc.org/pdf/trends2003_www_S.pdf (accessed 2 June 2005).
2. 2. European Monitoring Centre for Drugs Addiction. Annual Report 2006: The State of the Drugs Problem in Europe. 2006. Available at: http://ar2006.emcdda.europa.eu/en/home-en.html (accessed 29 March 2007).
3. 3. Substance Abuse and Mental Health Services Administration. Results from the 2004 National Survey on Drug Use and Health: National Findings. 2004. Available at: http://oas.samhsa.gov/NSDUH/2k4nsduh/2k4Results/2k4Results.pdf (accessed 20 March 2006).
4. Pharmacological treatment of cocaine dependence: a systematic review;de Lima;Addiction,2002
5. Agonist-like, replacement pharmacotherapy for stimulant abuse and dependence;Grabowski;Addict Behav,2004