https://trade.ec.europa.eu/doclib/docs/2021/july/tradoc_159709.pdf
http://www.ilo.org/wcmsp5/groups/public/—dgreports/—cabinet/documents/genericdocument/wcms_371208.pdf
https://ec.europa.eu/info/sites/info/files/2019-09-10-assessment-of-eu-fiscal-rules_en.pdf
https://www.bmj.com/content/359/bmj.j4530