https://www.ilo.org/wcmsp5/groups/public/—ed_norm/—relconf/documents/meetingdocument/wcms_624037.pdf
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/coe-rapport-travail-non-declare-fevrier-2019.pdf
https://www.bruegel.org/wp-content/uploads/2021/05/PC-2021-11-ecofin-210521.pdf
https://www.imf.org/en/News/Articles/2024/03/27/germanys-real-challenges-are-aging-underinvestment-and-too-much-red-tape