http://www.ilo.org/wcmsp5/groups/public/—ed_protect/—soc_sec/documents/publication/wcms_614324.pdf
https://www.lobbycontrol.de/2021/03/klare-kante-gesetze-verschaerfen/?pk_campaign=20210311&pk_source=nl
https://theconversation.com/the-gig-economy-is-nothing-new-it-was-standard-practice-in-the-18th-century-81057
https://www.thelancet.com/action/showPdf?pii=S1473-3099%2820%2930144-4