
https://www.publications.parliament.uk/pa/ld201314/ldselect/ldeucom/164/164.pdf

http://blogs.lse.ac.uk/europpblog/2018/04/06/a-global-agenda-for-labour/

https://www.etuc.org/fr/presse/rien-quen-2017-chaque-travailleur-subi-une-perte-de-salaire-de-1764-€-en-raison-de-la#.WqrAWUxuI2x