https://www.wto.org/english/res_e/booksp_e/oneyukr_e.pdf
https://wiiw.ac.at/navigating-trade-restrictions-dlp-6810.pdf
https://ir.citi.com/gps/4XZdf3%2FTki0Su8jAqZDaUQpE9uavlcQzlX1iYbkdIYylX9JIDBzNNLbLt9nzG9bLrAEB4NTeJIk%3D
http://visual.ons.gov.uk/trading-places-uk-goods-trade-with-eu-partners/