
https://www.politico.eu/article/shaky-grounds-secret-slipshod-evidence-eu-use-sanction-russia-oligarchs/

https://www.auswaertiges-amt.de/blob/2608580/49d50fecc479304c3da2e2079c55e106/china-strategie-en-data.pdf

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