
https://theworldnews.net/nl-news/voor-de-wereldhandel-is-biden-een-trump-met-manieren

https://www.bloomberg.com/news/articles/2019-09-11/world-s-oldest-customs-union-and-u-k-reach-a-post-brexit-deal

https://wiiw.ac.at/regulatory-convergence-within-technical-barriers-to-trade-dlp-6630.pdf