http://researchbriefings.files.parliament.uk/documents/CBP-7484/CBP-7484.pdf
http://ec.europa.eu/newsroom/just/item-detail.cfm?item_id=607452
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-2020-rapport-intermediaire-ordonnance-travail-juillet.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