http://www.oxera.com/Latest-Thinking/Publications/Reports/2017/Brexit-ports.aspx
http://www.icaew.com/-/media/corporate/files/technical/economy/brexit/eu-exit-charge.ashx
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/63/63.pdf
http://www.ips-journal.eu/regions/europe/article/show/remainers-revenge-really-2101/