
https://www.wto.org/english/res_e/booksp_e/wtr23_e/wtr23_e.pdf

https://wiiw.ac.at/can-multinationals-withstand-growing-trade-barriers-dlp-6732.pdf

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