https://www.etui.org/content/download/36217/363575/file/F-B_07_EN_WEB.pdf
https://trade.ec.europa.eu/doclib/docs/2021/july/tradoc_159709.pdf
https://www.brookings.edu/research/is-long-covid-worsening-the-labor-shortage/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=200588850&utm_source=hs_email
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-2020-rapport-intermediaire-ordonnance-travail-juillet.pdf