https://www.cer.eu/sites/default/files/insight_CG_letter_K.Starmer_8.7.24.pdf
https://www.waz.de/politik/gabriel-brexit-vertrag-als-modell-fuer-eu-tuerkei-beziehung-id212938393.html
https://www.ips-journal.eu/topics/democracy-and-society/serbias-cunning-kosovo-deflection-6754/
https://www.ceps.eu/wp-content/uploads/2013/02/1304.pdf