https://www.gmfus.org/sites/default/files/2021-09/Cristiani%20et%20al%20-%20report%20%281%29.pdf
https://www.gov.uk/government/news/david-davis-closing-remarks-at-the-end-of-the-fourth-round-of-eu-exit-negotiations-in-brussels
https://docs.wto.org/dol2fe/Pages/SS/directdoc.aspx?filename=q:/INF/TESSD/R4.pdf&Open=True