https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/974507/20210331_-_CRED_Report_-_FINAL_-_Web_Accessible.pdf
http://www.oecd.org/fr/emploi/emp/Editorial-and-executive-summary-FR.pdf
https://www.secours-catholique.org/sites/scinternet/files/publications/rapport_revenusans_contreparties.pdf