https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/129/129.pdf
https://www.timeshighereducation.com/fr/books/review-shadows-empire-anglosphere-british-politics-michael-kenny-and-nick-pearce-polity-press
https://ec.europa.eu/commission/publications/terms-reference-article-50-treaty-european-union-negotiations_en
http://www.cer.eu/sites/default/files/bulletin_118_js-sl_article2.pdf