https://www.otto-brenner-stiftung.de/fileadmin/user_data/stiftung/Aktuelles/AH93/AH_93_Haller_Web.pdf
https://www.socialeurope.eu/the-crisis-of-the-french-socialist-party-does-it-still-have-a-future
https://www.socialeurope.eu/turkey-wild-man-bosporus-sick-democracy-persecuted-trade-unions
http://www.levyinstitute.org/pubs/wp_886.pdf
https://www.socialeurope.eu/sweden-achievements-uncertainty
https://www.socialeurope.eu/eu-member-state-determined-others-greek-tragedy
https://europa.eu/globalstrategy/sites/globalstrategy/files/regions/files/eugs_review_web_0.pdf
http://www.ips-journal.eu/regions/europe/article/show/a-banking-union-without-unity-2181/
http://www.ips-journal.eu/topics/european-union/article/show/say-it-with-feeling-2184/
http://www.ips-journal.eu/in-focus/migration-and-the-european-left/article/show/turn-left-the-other-left-2179/