https://blog.bestforbritain.org/index.php/blog/polling-shows-no-brexit-definitely-better-bad-brexit/
https://www.instituteforgovernment.org.uk/sites/default/files/publications/voting-on-brexit-report-final.pdf
https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
http://www.ecfr.eu/page/-/Keeping_Europe_Safe_After_Brexit2.pdf