https://socialeurope.eu/why-a-new-university-of-labour
https://www.etui.org/content/download/36365/365328/file/WP+2019+07-wages-ST-WEB.pdf
http://library.fes.de/pdf-files/iez/13375.pdf
https://euagenda.eu/upload/publications/untitled-111339-ea.pdf