http://www.cer.eu/sites/default/files/bulletin_118_js-sl_article2.pdf
https://www.cer.eu/sites/default/files/insight_SL_5.11.19_2.pdf
https://blogs.lse.ac.uk/brexit/2021/04/13/the-totality-of-uk-irish-relations/
https://www.chba.org.uk/for-members/library/overseas-seminars/the-status-of-gibraltar-under-eu-law