https://static.rusi.org/202303-SR-Unconventional-Operations-Russo-Ukrainian-War-web-final.pdf.pdf
https://lawliberty.org/returning-to-the-lansdowne-doctrine/?utm_source=Weekly+Newsletters&utm_campaign=12cd90f463-EMAIL_CAMPAIGN_2022_08_24_07_43&utm_medium=email&utm_term=0_f460d0c2d2-12cd90f463-72608330
https://www.reuters.com/world/leaked-us-intel-document-claims-serbia-agreed-arm-ukraine-2023-04-12/
https://www.ips-journal.eu/topics/foreign-and-security-policy/the-world-of-tomorrow-7101/