http://www.oxera.com/Latest-Thinking/Publications/Reports/2017/Brexit-ports.aspx
https://www.timeshighereducation.com/fr/books/review-shadows-empire-anglosphere-british-politics-michael-kenny-and-nick-pearce-polity-press
https://hansard.parliament.uk/commons/2018-03-07/debates/65828E0C-3CC7-43AE-B5D2-B5F1B5D42A4C/EuropeanUnionCitizenship