
https://ec.europa.eu/commission/publications/terms-reference-article-50-treaty-european-union-negotiations_en

https://blogs.lse.ac.uk/brexit/2021/02/04/indyref2-scottish-independence-would-be-2-3-times-more-costly-than-that-of-brexit-and-rejoining-the-eu-wouldnt-make-up-the-difference/

https://www.britishcouncil.org/sites/default/files/the_value_of_trust.pdf