https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1663en.pdf
https://www.boeckler.de/pdf/p_study_hbs_376.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef19034en.pdf
https://www.socialeurope.eu/2017/06/dispelling-creative-myths-lower-employment-protection/