https://rm.coe.int/moneyval-annual-report-2020-eng-final/1680a2b3a4
https://verfassungsblog.de/dark-money-subverts-the-rule-of-law/
https://www.irs.gov/pub/irs-pdf/p5241.pdf
https://www.navexglobal.com/en-gb/file-download-canonical?file=/Navex_YOTW_Survey_Report_-_Executive_Summary_Final_0.pdf