Source
- The United Nations Office on Drugs and Crime´s World Drug Report 2018
https://www.unodc.org/wdr2018/
- Justice department: Opioid Manufacturer Purdue Pharma Pleads Guilty to Fraud and Kickback Conspiracies
https://www.justice.gov/opa/pr/opioid-manufacturer-purdue-pharma-pleads-guilty-fraud-and-kickback-conspiracies
- Daytrading.com
https://www.daytrading.com/diversification
