https://www.esri.ie/system/files/publications/RS155.pdf
https://www.acams.org/en/media/document/russia-sanctions-evasion-key-methods-and-techniques-part-2
https://cepr.org/sites/default/files/news/CovidEconomics19.pdf?utm_medium=email&utm_source=govdelivery#Paper2
https://multinationales.org/IMG/pdf/pfuesousinfluence.pdf