https://wiiw.ac.at/the-russian-economy-amidst-the-war-and-sanctions-dlp-6727.pdf
https://www.jstor.org/stable/25472435
https://dgap.org/system/files/article_pdfs/dgap-report-2023-01-EN-Rethinking%20EUs%20Eastern%20Enlargement_0.pdf
https://www.aspistrategist.org.au/the-non-proliferation-problem/