https://www.wto.org/english/res_e/reser_e/ullbergpresentation_e.pdf
https://openknowledge.worldbank.org/bitstream/handle/10986/34055/9781464815393.pdf?sequence=2&isAllowed=y
http://trade.ec.europa.eu/doclib/docs/2017/june/tradoc_155642.pdf
https://saiia.org.za/wp-content/uploads/2024/08/SAIIA_PI_154_JapanAfricaEngagement.pdf