
http://justfair.org.uk/wp-content/uploads/2019/01/JFothers-submission-WPC-Dec2018-FINAL.pdf

https://www.ecfr.eu/article/commentary_european_solidarity_tracker_the_solidarity_that_always_was_there

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