http://www.consilium.europa.eu//media/32504/xt21004-ad01re02en18.pdf
http://www.cer.eu/sites/default/files/pb_ireland_brexit_6.7.17.pdf
http://www.rug.nl/research/portal/files/41711829/cesifo1_wp6448.pdf
https://www.niesr.ac.uk/sites/default/files/UK%20Economy%20Press%20Release%20-NIER%20No245%20%20August%202018%20-%20EMBARGOED%20until%2000.01%20Wednesday%201st%20August.pdf