http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821
https://thecritic.co.uk/take-trade-experts-and-their-models-with-a-bucket-of-salt/
https://www.socialeurope.eu/wp-content/uploads/2018/05/BP1-Devolution.pdf
http://www.parliament.uk/documents/commons-committees/Exiting-the-European-Union/17-19/Cross-Whitehall-briefing/EU-Exit-Analysis-Cross-Whitehall-Briefing.pdf