https://www.boeckler.de/data/downloads/IMK/FMM%20Konferenz%202023/v_2023_10_20_goekten.pdf
https://www.etui.org/sites/default/files/2025-06/Non-standard%20and%20precarious%20work%20across%20Europe_2025.pdf
https://www.cer.eu/sites/default/files/insight_JS_JP_17.1.23.pdf
https://frictions.co/english/linsoutenable-legerete-du-labeur/working-ourselves-clean/