https://www.esri.ie/system/files/publications/JR2.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18005en.pdf
https://www.ccomptes.fr/system/files/2019-07/20190716-rapport-regimes-speciaux-retraite.pdf
https://www.socialeurope.eu/israel-palestine-a-comparative-perspective