1. Agreement between the Kingdom of Belgium, the Kingdom of the Netherlands, and The Grand Duchy of Luxembourg concerning the integration of air security to respond to threats posed by non-military (renegade) aircraft. (2015). Retrieved from https://treatydatabase.overheid.nl/en/Verdrag/Details/013124/013124_Gewaarmerkt_0.pdf
2. Bennhold, K. (2019, May 7). As far right rises, a battle over security agencies grows. The New York Times. Retrieved from https://www.nytimes.com/
3. Quid Pro Quo: The Challenges of International Strategic Intelligence Cooperation
4. Commissie van Toezicht op de Inlichtingen- en Veiligheidsdiensten (CTIVD). (2018, November 14). Joint statement: strengthening intelligence oversight cooperation. Review Committee on the Intelligence and Security Services. Retrieved from: https://english.ctivd.nl/latest/news/2018/11/14/index