https://ec.europa.eu/info/sites/info/files/opinion-comite-adhoc-2016-10-26_en.pdf
http://www.eliamep.gr/en/all-publications/publications/h-%CE%B4%CF%81-%CE%B5%CE%BB%CE%AD%CE%BD%CE%B7-%CF%80%CE%B1%CE%BD%CE%B1%CE%B3%CE%B9%CF%89%CF%84%CE%B1%CF%81%CE%AD%CE%B1-%CE%B1%CE%BD%CE%B1%CE%BB%CF%8D%CE%B5%CE%B9-%CF%84%CE%BF%CE%BD-%CF%84%CF%81%CF%8C/
http://www.dw.com/en/german-election-ballot-box-closed-to-78-million-residents/a-40359141?utm_source=POLITICO.EU&utm_campaign=faf83bd02a-EMAIL_CAMPAIGN_2017_09_11&utm_medium=email&utm_term=0_10959edeb5-faf83bd02a-189647205
https://www.instituteforgovernment.org.uk/sites/default/files/publications/International-civil-service-effectiveness-index-July-17.pdf
https://yougov.co.uk/news/2017/08/30/brits-are-more-likely-have-been-paris-edinburgh/
https://www.brookings.edu/wp-content/uploads/2017/09/4_alganetal.pdf
http://www.bertelsmann-stiftung.de/en/topics/aktuelle-meldungen/2017/september/germans-are-more-optimistic-about-their-future-than-their-european-neighbours/
https://www.brookings.edu/wp-content/uploads/2017/09/3_benediktsdottiretal.pdf
http://www.ips-journal.eu/regions/europe/article/show/lessons-for-the-left-2270/
http://www.ips-journal.eu/topics/european-union/article/show/reparations-and-the-crisis-of-polands-foreign-policy-2260/