1. UNODC, Recommended methods for the identification and analysis of cannabis and cannabis products; 2009.
2. UNODC, World drug report; 2013.
3. Adverse health effects of non-medical cannabis use;Hall;Lancet,2009
4. European Monitoring Centre for Drugs and Drug Addiction, Cannabis. ; 2011.
5. High-potency cannabis and the risk of psychosis;Di Forti;Br J Psychiatry,2009