
https://www.ips-journal.eu/topics/foreign-and-security-policy/a-barbed-wire-curtain-around-europe-6602/?utm_campaign=en_1084_20230327&utm_medium=email&utm_source=newsletter

https://freedomhouse.org/sites/default/files/Feb2019_FH_FITW_2019_Report_ForWeb-compressed.pdf

https://media.defense.gov/2022/Mar/28/2002964702/-1/-1/1/NDS-FACT-SHEET.PDF