https://news.sky.com/story/ukraine-war-forces-ireland-to-question-its-traditional-neutrality-12567337
https://www.sussex.ac.uk/webteam/gateway/file.php?name=briefing-paper-1.pdf&site=18
http://www.aviationlaw.eu/wp/wp-content/uploads/2013/09/Freedoms-of-the-Air-Explained.pdf