http://The European Social Pillar – Towards An EU Minimum Wage Policy?
https://www.socialeurope.eu/catalonia-dreaming
http://www.ips-journal.eu/topics/european-union/article/show/say-it-with-feeling-2184/
https://www.ilo.org/legacy/english/inwork/cb-policy-guide/declarationofPhiladelphia1944.pdf