1. U. S. Department of Justice, Drug Enforcement Administration, National Drug Threat Assessment Summary, 2015;
https://www.dea.gov/docs/2015%20NDTA%20Report.pdf.
2. Stenogramma vystupleniya ministra vnutrennikh del RF V. A. Kolokol´tseva v Sovete Federatsii 28 marta 2108 g. [Shorthand record of the speech of the Minister of Internal Affairs of the Russian Federation V. A. Kolokol´tsev in the Council of Federation on March 28, 2018];
http://www.council.gov.ru
/activity/meetings/90693/transcript/(in Russian).
3. Osnovnye pokazateli deyatel´nosti narkologicheskoi sluzhby Rossiiskoi Federatsii v 2015–2016 gg.: statisticheskii sbornik [Main activity indices of the Narcological Service of the Russian Federation in 2015–2016: statistics digest], National Research Center of Narcology, Branch of the Serbsky Federal Medical Research Center of Psychiatry and Narcology, Ministry of Health of the Russian Federation, Moscow, 2017, 183 pp. (in Russian).
4. G. E. Woody, Curr. Psychiatry Rep., 2014, 16,489.
5. R. D. Heekin, D. Shorter, T. R. Kosten, Expert. Rev. Vaccines, 2017, 16, 1067.