https://cepr.org/sites/default/files/policy_insights/PolicyInsight98.pdf
https://www.econstor.eu/bitstream/10419/283282/1/1877510009.pdf
https://www.greatbritishpolitics.co.uk/europe/654-dual-nationality-and-the-hurdles-facing-britons-who-want-to-keep-eu-citizenship-after-brexit.html
https://www.brookings.edu/articles/why-do-the-u-s-and-its-allies-want-to-seize-russian-reserves-to-aid-ukraine/