
https://www.socialeurope.eu/2017/06/trade-unions-and-the-decline-of-social-democracy/

http://www.geog.qmul.ac.uk/media/geography/docs/research/working-beyond-the-border/Governing-Labour-Standards.pdf

https://www.greeneuropeanjournal.eu/du-socle-europeen-de-droits-sociaux-a-leuro-dividende-le-choix-dune-europe-sociale-ambitieuse/