https://bdi.eu/media/user_upload/20171005_Pressemitteilung_Brexit.pdf
https://blogs.lse.ac.uk/brexit/2019/11/04/would-a-more-educated-population-have-rejected-brexit/
https://www.cbi.org.uk/media/4112/the-red-tape-challenge-final.pdf
http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf