https://openeurope.org.uk/today/blog/what-would-a-no-deal-after-the-transition-period-look-like/
http://fedtrust.co.uk/mrs-may-in-florence/
http://docs.dpaq.de/10395-0216-euco-conclusions.pdf
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6448&CESifoWP.search=+