https://www.piie.com/sites/default/files/2023-04/pb23-3.pdf
https://www.nzz.ch/meinung/russland-gegen-ukraine-putin-plant-einen-langen-krieg-ld.1772254
https://www.eastasiaforum.org/2020/04/01/the-us-china-and-asia-after-the-pandemic-more-not-less-tension/