
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/643924/Foreign_policy__defence_and_development_paper.pdf

https://www.ips-journal.eu/topics/foreign-and-security-policy/belarus-and-china-together-through-thick-and-thin-6461/

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