1. Historical and cultural aspects of man's relationship with addictive drugs
2. Centers for Disease Control and Prevention.Annual Surveillance Report of Drug‐Related Risks and Outcomes — United States Surveillance Special Report 2019. Centers for Disease Control and Prevention U.S. Department of Health and Human Services p.101. Published November 1 2019. Accessed [December 1 2020] fromhttps://www.cdc.gov/drugoverdose/pdf/pubs/2019-cdc-drug-surveillancereport.pdf
3. European Monitoring Centre for Drugs and Drug Addiction. (2020) European Drug Report 2020: Trends and Developments Publications Office of the European Union Luxembourg p. 66. Accessed December 1 2020.www.emcdda.europa.eu/edr/trends_developments/2020_enPenington Institute. Australia's Annual Overdose Report 2020. Melbourne: Penington Institute p. 19. Accessed December 1 2020.www.penington.org/publications/2020-overdose-report/