https://home.kpmg.com/content/dam/kpmg/nl/pdf/2018/sector/overheid/impact-van-non-tarifaire-handelsbelemmeringen-als-gevolg-van-brexit.pdf
http://blogs.lse.ac.uk/brexit/2017/09/28/the-eu-referendum-was-gerrymandered/
http://www.cer.eu/sites/default/files/pb_ireland_brexit_6.7.17.pdf