http://www.consilium.europa.eu//media/32504/xt21004-ad01re02en18.pdf
https://www.irishtimes.com/opinion/editorial/the-irish-times-view-on-brexit-day-britain-s-great-leap-backwards-1.4156666
http://blogs.lse.ac.uk/politicsandpolicy/john-mills-ge2017/
https://www.ft.com/content/ed91e91a-87f2-11e7-8bb1-5ba57d47eff7