https://www.wto.org/english/res_e/booksp_e/oneyukr_e.pdf
http://blogs.worldbank.org/developmenttalk/wto-s-trade-facilitation-agreement-and-doing-business-reforms-are-they-related-and-how
https://www.politico.eu/wp-content/uploads/2020/05/LetterVDL12052020EN.pdf
https://www.eca.europa.eu/ECAPublications/SR-2023-13/SR-2023-13_EN.pdf