https://www.rferl.org/a/russia-club-csto-ukraine-military-alliance/32079498.html
https://www.ifri.org/sites/default/files/atoms/files/ifri_zima_fortifier_la_pologne_2024.pdf
https://theconversation.com/ukraine-war-russias-hard-line-at-european-security-meeting-ratchets-up-tensions-another-notch-218938
https://www.sigar.mil/pdf/lessonslearned/SIGAR-21-46-LL.pdf