http://sydneydemocracynetwork.org/article-brexit-yes-will-suffer-well/
https://blogs.lse.ac.uk/brexit/2019/04/15/brexit-lessons-from-the-silesian-backstop-of-1919-25/
http://blogs.lse.ac.uk/politicsandpolicy/john-mills-ge2017/
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-ongoing-police-and-judicial-cooperation-criminal-matters_en