https://www.friendsofeurope.org/sites/default/files/media-files/uk_report_web.pdf
https://ec.europa.eu/commission/sites/beta-political/files/guiding-principles-dialogue-ei-ni_en.pdf
http://www.fdiintelligence.com/Landing-Pages/fDi-Podcast/The-fDi-Podcast?utm_campaign=fDi+Podcast%3A+August+2017&utm_source=emailCampaign&utm_medium=email&utm_content=
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/