http://blogs.lse.ac.uk/politicsandpolicy/john-mills-ge2017/
https://www.ifs.org.uk/publications/10302
http://reutersinstitute.politics.ox.ac.uk/risj-review/sympathetic-unconcerned-how-europes-media-cover-brexit
https://home.kpmg.com/content/dam/kpmg/nl/pdf/2018/sector/overheid/impact-van-non-tarifaire-handelsbelemmeringen-als-gevolg-van-brexit.pdf