https://www.reuters.com/world/leaked-us-intel-document-claims-serbia-agreed-arm-ukraine-2023-04-12/
https://www.brookings.edu/blog/order-from-chaos/2021/03/30/the-us-military-must-plan-for-encounters-with-private-military-companies/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=118778216&utm_source=hs_email
http://www.euronews.com/2017/08/03/view-why-are-authoritarian-democratic-leaders-getting-so-popular?utm_source=newsletter&utm_medium=en&utm_content=view-why-are-authoritarian-democratic-leaders-getting-so-popular&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==
https://www.europarl.europa.eu/doceo/document/PEGA-PR-738492_EN.pdf