
https://www.bruegel.org/sites/default/files/2022-11/WP%2018.pdf

https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/

https://borderlex.net/2021/04/13/comment-quo-vadis-energy-charter-treaty/