
https://www.europarl.europa.eu/meetdocs/2009_2014/documents/deea/dv/2203_07/2203_07en.pdf

http://www.cam.ac.uk/research/news/cognitive-flexibility-associated-with-voting-attitudes-in-eu-referendum-study-finds

https://blogs.lse.ac.uk/brexit/2018/10/30/after-brexit-the-uk-should-be-able-to-re-enter-the-eu-if-it-wishes-to-do-so/