https://www.lobbycontrol.de/wp-content/uploads/Lobbycontrol-Studie-Wirtschaftsrat-Klimabremser.pdf
http://visionofhumanity.org/app/uploads/2017/06/GPI-2017-Report-1.pdf
https://www.openglobalrights.org/why-countries-should-welcome-not-fear-foreign-funding-of-NGOs/
https://www.lawfareblog.com/what-media-has-learned-2016%E2%80%94and-what-it-hasnt