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

https://blogs.lse.ac.uk/europpblog/2021/11/05/who-should-pay-for-a-states-wrongdoings/

https://www.openglobalrights.org/rights-and-responsibilities-in-the-coronavirus-pandemic/?lang=English