http://fedtrust.co.uk/our-work-on-europe/hard-brexit-international-trade-and-the-wto-scenario/
https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
https://www.socialeurope.eu/brexit-shows-us-real-first-world-problems-look-like
http://www.ips-journal.eu/regions/europe/article/show/battle-of-the-bulldogs-2063/