https://ecfr.eu/wp-content/uploads/Ambiguous-alliance-Neutrality-opt-outs-and-European-defence.pdf
https://www.gmfus.org/news/what-next-diplomacy-between-west-and-russia?utm_source=email&utm_medium=email&utm_campaign=ww%20russia%20crisis_1%20%202022-22-01
https://www.foreignaffairs.com/china/end-china-economic-miracle-beijing-washington
https://sipri.org/sites/default/files/2017-09/yb17-summary-eng.pdf