https://www.crisisgroup.org/europe-central-asia/eastern-europe/ukraine/long-war-ukraine-perspectives-kyiv-and-washington
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1052148/benefits-of-brexit-document.pdf
https://media.defense.gov/2022/Mar/28/2002964028/-1/-1/1/_JIPA_MARCH-APRIL%202022.PDF/_JIPA_MARCH-APRIL%202022.PDF