
https://www.progressivepolicy.org/blogs/trade-fact-of-the-week-americas-non-mfn-tariffs-on-natural-resources-are-usually-low/

https://www.nao.org.uk/wp-content/uploads/2018/01/Implementing-the-UKs-exit-from-the-European-Union-the-Deparment-for-International-Trade.pdf

https://www.euronews.com/2019/10/19/european-countries-halted-arm-exports-to-turkey-but-why-haven-t-they-done-the-same-for-sau