https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1711en.pdf
http://www.acea.be/uploads/publications/ACEA_position_paper-Brexit.pdf
https://www.etui.org/sites/default/files/2020-12/Social%20policy%20in%20the%20European%20Union%20state%20of%20play%202020-web.pdf
https://www.boeckler.de/data/downloads/IMK/FMM%20Konferenz%202023/v_2023_10_20_goekten.pdf