https://wiiw.ac.at/regulatory-convergence-within-technical-barriers-to-trade-dlp-6630.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf
https://trade.ec.europa.eu/doclib/docs/2021/february/tradoc_159438.pdf
https://www.politico.eu/article/ursula-von-der-leyen-joe-biden-trade-europe-first-brussels-gets-ready-to-dump-its-free-trade-ideals/