https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1609en.pdf
http://www.institutdelors.eu/media/europeidentitemythes-bouchard-ijd-dec16.pdf?pdf=ok
https://www.socialeurope.eu/2017/06/the-case-for-an-investment-state/
https://www.socialeurope.eu/poland-crossroads-authoritarianism-democracy