https://unctad.org/system/files/official-document/wir2021_overview_en.pdf
https://www.socialeurope.eu/the-discreet-but-dubious-charm-of-tax-treaties
http://trade.ec.europa.eu/doclib/docs/2019/june/tradoc_157964.pdf
https://ecipe.org/wp-content/uploads/2021/09/ECI_21_PolicyBrief_13_2021_LY02.pdf