
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18002en.pdf

https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef19036en.pdf

https://www.ips-journal.eu/topics/democracy-and-society/german-companies-have-to-ensure-decent-working-conditions-5013/