
https://www.eeas.europa.eu/eeas/ukraine-statement-high-representative-josep-borrell-illegal-%E2%80%9Creferenda%E2%80%9D-luhansk-kherson-and_en

http://www.ips-journal.eu/regions/africa/article/show/g20-summit-africas-loss-2167/

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