https://www.ilo.org/legacy/english/inwork/cb-policy-guide/declarationofPhiladelphia1944.pdf
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/coe-rapport-travail-non-declare-fevrier-2019.pdf
https://www.etui.org/content/download/36365/365328/file/WP+2019+07-wages-ST-WEB.pdf
https://www.ilo.org/wcmsp5/groups/public/—dgreports/—cabinet/documents/publication/wcms_662442.pdf
https://www.ilo.org/wcmsp5/groups/public/—ed_norm/—relconf/documents/meetingdocument/wcms_624037.pdf
https://www.etui.org/content/download/36217/363575/file/F-B_07_EN_WEB.pdf
https://www.llri.lt/wp-content/uploads/2018/06/Labour-Migration_3.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18037en.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18001en.pdf
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