
https://www.occrp.org/en/daily/12149-denmark-will-not-give-aid-to-companies-registered-in-tax-havens

https://www.nber.org/system/files/working_papers/w30028/w30028.pdf

https://fpc.org.uk/wp-content/uploads/2020/12/Unsafe-for-Scrutiny-December-2020-publication.pdf