
https://www.sussex.ac.uk/webteam/gateway/file.php?name=briefing-paper-1.pdf&site=18

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.washingtonpost.com/opinions/interactive/2023/ukraine-war-analysis-stalemate-economy-aid/