
http://www.msn.com/en-gb/news/uknews/ftse-100-chiefs%e2%80%99-fury-at-no-10-letter-backing-ministers-on-brexit/ar-AArpKuh

http://www.rug.nl/research/portal/files/41711829/cesifo1_wp6448.pdf

http://www.conservativehome.com/platform/2017/05/what-would-wto-mean-andrew-stoler-and-geoff-raby-brexit-britain-has-no-need-to-fear-wto-terms.html