https://ec.europa.eu/commission/sites/beta-political/files/customs_controls_0.pdf
https://committees.parliament.uk/publications/30492/documents/175947/default/
https://wiiw.ac.at/are-western-trade-sanctions-effective-dlp-6981.pdf
https://theconversation.com/is-eu-regulation-really-so-bad-for-the-uk-83193