http://www.case-research.eu/files/?id_plik=5223
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18036en.pdf
https://www.socialeurope.eu/eu-member-state-determined-others-greek-tragedy
https://www.dni.gov/index.php/global-trends/the-future-summarized