https://www.mckinsey.com/mgi/our-research/geopolitics-and-the-geometry-of-global-trade
https://cdn.ymaws.com/www.export.org.uk/resource/resmgr/docs/policy_papers/IOE&IT_report_with_EY_TradeT.pdf
https://fullfact.org/europe/how-many-free-trade-deals-has-eu-done/
http://trade.ec.europa.eu/doclib/docs/2017/june/tradoc_155642.pdf