https://www.gmfus.org/sites/default/files/2021-09/Cristiani%20et%20al%20-%20report%20%281%29.pdf
https://theworldnews.net/nl-news/voor-de-wereldhandel-is-biden-een-trump-met-manieren
https://ukandeu.ac.uk/trade-migration-and-brexit/
https://www.ceps.eu/wp-content/uploads/2021/03/PI2021-05_The-power-surplus.pdf