https://www.institute.global/insights/geopolitics-and-security/windsor-framework-what-has-been-agreed-and-what-it-means-northern-ireland-protocol
http://www.bankofengland.co.uk/publications/Documents/fsr/2017/fsrjun17.pdf
https://corporateeurope.org/sites/default/files/ceo-captured-states-final_0.pdf