https://www.socialeurope.eu/eu-enlargement-prospects-and-challenges
https://wiiw.ac.at/the-berlin-process-for-the-western-balkans-four-recommendations-to-achieve-progress-n-582.html
http://docs.dpaq.de/10395-0216-euco-conclusions.pdf
http://www.etui.org/Publications2/Books/Innovative-union-practices-in-Central-Eastern-Europe