
https://ukandeu.ac.uk/explainers/the-protocol-on-ireland-northern-ireland/?mc_cid=2bd4dc8e93&mc_eid=815b1928ec

http://www.ips-journal.eu/regions/europe/article/show/battle-of-the-bulldogs-2063/

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