
https://www.institutmontaigne.org/en/publications/rebooting-europes-china-strategy

https://www.crisisgroup.org/europe-central-asia/balkans/kosovo/269-northern-kosovo-asserting-sovereignty-amid-divided-loyalties

http://www.aviationlaw.eu/wp/wp-content/uploads/2013/09/Freedoms-of-the-Air-Explained.pdf