1. Cocaine Abuse: Behavior, Pharmacology, and Clinical Applications;Higgins,1998
2. United Nations Office on Drugs and Crime, World Drug Report 2020. https://wdr.unodc.org/wdr2020/index.html, 2020 (accessed 14.02.2021).
3. European Monitoring Centre for Drugs and Drug Addiction, European Drug Report 2020: Trends and Developments. https://www.emcdda.europa.eu/publications/edr/trends-developments/2020_en, 2020 (accessed 14.02.2021).
4. European Monitoring Centre for Drugs and Drug Addiction, Europol, EU Drug Markets Report 2019. https://op.europa.eu/publication/manifestation_identifier/PUB_TD0216072ENN, 2019 (accessed 14.02.2021).
5. European Monitoring Centre for Drugs and Drug Addiction, Europol, European Drug Report 2019: Trends and Developments. http://publications.europa.eu/publication/manifestation_identifier/PUB_TDAT19001ENN, 2019 (accessed 14.02.2021).