https://www.boeckler.de/pdf/p_wsi_report_52_2019.pdf
http://www.bankofengland.co.uk/publications/Documents/inflationreport/2017/aug.pdf
https://securingdemocracy.gmfus.org/wp-content/uploads/2020/08/ASD-Covert-Foreign-Money.pdf
https://www.rijksoverheid.nl/binaries/rijksoverheid/documenten/kamerstukken/2022/04/04/joint-paper-eurogroup-es-nl/joint-paper-eurogroup-es-nl.pdf