https://institute.global/news/brexit-realities-taking-back-control
http://www.assemblee-nationale.fr/14/pdf/rap-info/i4485.pdf
https://ec.europa.eu/commission/sites/beta-political/files/guiding-principles-dialogue-ei-ni_en.pdf
http://www.parliament.uk/documents/commons-committees/Exiting-the-European-Union/17-19/Cross-Whitehall-briefing/EU-Exit-Analysis-Cross-Whitehall-Briefing.pdf