https://www.kyivpost.com/article/opinion/op-ed/steven-pifer-ukraine-and-nato-dont-ask-do.html
https://ec.europa.eu/transparency/documents-register/api/files/COM(2023)506_0/090166e501018b23?rendition=false
https://theconversation.com/berlin-blockade-75-years-on-how-russian-occupation-tactics-in-ukraine-echo-soviet-actions-in-east-germany-207875
https://www.aspi.org.au/report/state-sponsored-economic-cyber-espionage-commercial-purposes-governmental-practices