https://static.rusi.org/special-report-202204-operation-z-web.pdf
https://www.eca.europa.eu/Lists/ECADocuments/REW19_09/REW_EU-defence_EN.pdf
https://www.crisisgroup.org/global/un-security-council-between-rifts-and-reform
https://www.crisisgroup.org/europe-central-asia/eastern-europe/ukraine/b96-answering-four-hard-questions-about-russias-war-ukraine