
http://www.strengthentheeuro.eu/fileadmin/files/user_upload/EZ_flashlight_europe_2017_05_ENG.pdf

http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf

http://www.independent.co.uk/news/uk/politics/article-127-brexit-stop-what-is-it-single-market-eu-eea-theresa-may-article-50-a7955806.html