https://www.spectator.co.uk/article/full-text-top-uk-brexit-negotiator-david-frost-on-his-plans-for-an-eu-trade-deal
https://www.trade.gov/sites/default/files/2023-04/PAC-DBIA%20Report_Apr%202023.pdf
https://wiiw.ac.at/cefta-trade-and-growth-patterns-fifteen-years-since-establishment-dlp-6508.pdf