https://sipri.org/media/press-release/2018/global-military-spending-remains-high-17-trillion
https://www.washingtonpost.com/politics/2022/09/21/why-russias-mobilization-may-lower-risk-nuclear-war-now/?isMobile=1&utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=227018614&utm_source=hs_email
https://blogs.lse.ac.uk/europpblog/2023/08/31/the-russo-ukrainian-war-by-serhii-plokhy-book-review/
http://dip21.bundestag.de/dip21/btd/19/072/1907200.pdf