
https://blogs.lse.ac.uk/brexit/2019/06/26/did-we-ever-really-understand-how-the-eu-works/

https://www.conservativehome.com/parliament/2018/07/our-brexit-plan-takes-back-control-of-money-laws-and-borders-and-heres-how-may-and-raabs-letter-to-conservative-mps.html

http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf