https://publications.parliament.uk/pa/cm201719/cmselect/cmbeis/380/380.pdf
https://institute.global/news/brexit-what-we-now-know
http://www.conservativegroupforeurope.org.uk/wordpress/wp-content/uploads/2017/09/Keeping-the-bridges-open-a-CGE-Policy-Options-Paper-.pdf
http://The EU Won’t Help a Weakened Theresa May