
https://ec.europa.eu/commission/sites/beta-political/files/seminar-20200114-lpf_en.pdf

http://blogs.lse.ac.uk/brexit/2017/12/05/a-high-risk-game-of-chicken-is-being-played-over-the-irish-border/

https://www.euronews.com/2018/09/25/why-is-the-irish-border-issue-so-complex-euronews-answers