https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef20001en.pdf
https://www.ccomptes.fr/system/files/2019-07/20190716-rapport-regimes-speciaux-retraite.pdf
https://wiiw.ac.at/employment-effects-of-offshoring-technological-change-and-migration-in-a-group-of-western-european-economies-impact-on-different-occupations-dlp-6500.pdf
http://blogs.lse.ac.uk/europpblog/2018/04/06/a-global-agenda-for-labour/