
https://www.eeas.europa.eu/eeas/ukraine-statement-high-representative-josep-borrell-illegal-%E2%80%9Creferenda%E2%80%9D-luhansk-kherson-and_en

https://www.bertelsmann-stiftung.de/fileadmin/files/user_upload/Keeping_friends_closer.pdf

https://www.brookings.edu/articles/payment-systems-changing-role-from-economic-growth-to-the-new-foreign-policy-lever/