https://www.ilo.org/legacy/english/inwork/cb-policy-guide/declarationofPhiladelphia1944.pdf
http://clicks.aweber.com/y/ct/?l=6Kg2E&m=3gmzm3kLyhe3Fj_&b=VCKtJ1Fa5.pazcz00oSFLg
https://www.esri.ie/system/files/publications/RS123.pdf
https://www.etui.org/sites/default/files/2022-02/The%20platform%20economy%20in%20Europe_2022.pdf