https://trade.ec.europa.eu/doclib/docs/2021/february/tradoc_159438.pdf
https://theconversation.com/challenges-to-free-trade-reveal-a-big-change-in-conservative-ideology-209953
http://www.morganstanley.com/ideas/global-trade-protectionism
http://Bridging to Brexit: Insights from European SMEs, Corporates and Investors