https://www.iai.it/sites/default/files/iai1910.pdf
https://www.brookings.edu/articles/how-europe-can-avoid-a-transatlantic-trade-war/
https://www.cesifo-group.de/DocDL/ifoDD_18-01_29-31_Achten.pdf
https://ustr.gov/sites/default/files/2019_National_Trade_Estimate_Report.pdf