https://blogs.lse.ac.uk/brexit/2021/04/13/the-totality-of-uk-irish-relations/
https://www.wilsoncenter.org/sites/default/files/media/uploads/documents/MexicoElectionBookletFinalWebProof.pdf
http://www.parliament.uk/documents/commons-committees/Exiting-the-European-Union/17-19/Cross-Whitehall-briefing/EU-Exit-Analysis-Cross-Whitehall-Briefing.pdf
https://publications.parliament.uk/pa/ld5801/ldselect/ldeucom/4/4.pdf