https://blogs.lse.ac.uk/europpblog/2023/11/07/europe-ukraine-and-the-west/
https://voxeu.org/system/files/epublication/Economics%20of%20Brexit.pdf
https://www.brookings.edu/wp-content/uploads/2020/11/Future-U.S.-policy-toward-China-v8.pdf
https://www.sigar.mil/pdf/lessonslearned/SIGAR-21-46-LL.pdf