https://www.iwh-halle.de/fileadmin/user_upload/publications/iwh_discussion_papers/iwh-discussion-paper_2019-04_Brautzsch_Holtemoeller.pdf
https://www.imk-boeckler.de/fpdf/HBS-008792/p_imk_study_91_2024.pdf
https://www.etui.org/sites/default/files/2022-01/22%20Social%20policy%20in%20the%20European%20Union.%20State%20of%20play%202021.%20Social%20ambitions%20EU%20pandemic_2022.pdf