https://internationalepolitik.de/system/files/article_pdfs/IP_05-2020_Kurtz_oB.pdf
http://www.ilo.org/wcmsp5/groups/public/—dgreports/—dcomm/—publ/documents/publication/wcms_490959.pdf
https://www.opendemocracy.net/sam-hufton/treatise-on-european-government-international?utm_source=Daily+Newsletter&utm_campaign=56a87bc735-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-56a87bc735-407405485
https://www.thelancet.com/action/showPdf?pii=S0140-6736%2820%2930461-X