http://carnegieeurope.eu/2017/06/15/bringing-brexit-back-to-reality-pub-71262
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf
http://www.ips-journal.eu/regions/europe/article/show/battle-of-the-bulldogs-2063/