https://www.piie.com/blogs/realtime-economics/new-rules-curbing-us-investment-china-will-be-tricky-implement
https://blogs.lse.ac.uk/brexit/2019/04/15/brexit-lessons-from-the-silesian-backstop-of-1919-25/
https://www.brookings.edu/wp-content/uploads/2020/02/US_led_currency-war_final.pdf