http://blogs.lse.ac.uk/brexit/2017/07/05/bloody-difficult-britain-has-already-blown-its-chances-of-a-good-deal-from-the-eu27/
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-issues-relating-functioning-union-institutions-agencies-and-bodies_en
http://www.cam.ac.uk/research/news/cognitive-flexibility-associated-with-voting-attitudes-in-eu-referendum-study-finds