https://www.esri.ie/system/files/publications/RB202017_2.pdf
https://www.icij.org/investigations/cyprus-confidential/fbi-called-in-to-help-cyprus-investigate-russian-sanctions-dodging/
https://www.politico.eu/article/eu-warn-financial-risk-andorra-monaco-san-marino/
http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf