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

http://www.britishchambers.org.uk/press-office/press-releases/bcc-open-letter-to-pm-businesses-need-clarity-on-brexit.html

http://www.cer.eu/sites/default/files/bulletin_118_js-sl_article2.pdf