http://www.bakermckenzie.com/-/media/files/insight/publications/brexit_tradeflows.pdf?la=en
http://www.ecfr.eu/page/-/Keeping_Europe_Safe_After_Brexit2.pdf
http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf
https://www.esri.ie/system/files/publications/WP677_0.pdf