https://www.wto.org/english/res_e/booksp_e/00_wtr19_e.pdf
https://docs.wto.org/dol2fe/Pages/SS/directdoc.aspx?filename=q:/INF/TESSD/R4.pdf&Open=True
https://www.wto.org/english/thewto_e/whatis_e/tif_e/understanding_e.pdf
https://ecipe.org/wp-content/uploads/2023/06/ECI_23_PolicyBrief_06-2023_LY05.pdf