https://www.gov.uk/government/news/pms-european-council-press-statement-20-october-2017
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6448&CESifoWP.search=+
https://infacts.org/queen-flip-flops-limbering-another-big-one/
https://dbei.gov.ie/en/Publications/Publication-files/Ireland-and-the-Impacts-of-Brexit.pdf