Source
Institute on Drugs and Drug Addiction, I.P., "2012 National Report (2011 data) to the EMCDDA by the Reitox National Focal Point: PORTUGAL: New Development, Trends and in-depth information on selected issues" (Lisbon, Portugal: 2012), Table 1, pp 23-24.
http://www.emcdda.europa.eu/h…
http://www.emcdda.europa.eu/a…