https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1663en.pdf
http://visegradinsight.eu/app/uploads/2019/11/EaP-2030-Trends.pdf
https://www.ilo.org/legacy/english/inwork/cb-policy-guide/declarationofPhiladelphia1944.pdf
https://www.ips-journal.eu/topics/democracy-and-society/german-companies-have-to-ensure-decent-working-conditions-5013/