https://www.dw.com/en/germanys-economic-time-bomb-the-labor-crisis/a-65522919
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/coe-rapport-travail-non-declare-fevrier-2019.pdf
https://theconversation.com/the-gig-economy-is-nothing-new-it-was-standard-practice-in-the-18th-century-81057
https://economicgraph.linkedin.com/resources/linkedin-workforce-report-uk-april-2018