https://www.wilsoncenter.org/blog-post/cold-war-chessboard
https://elpais.com/internacional/2023-12-27/niall-ferguson-rusia-puede-ganar-la-guerra-la-politica-exterior-de-biden-ha-sido-un-fracaso.html
http://www.beaconforfreedom.org/liste.html?tid=415&art_id=475%20
http://www.css.ethz.ch/content/dam/ethz/special-interest/gess/cis/center-for-securities-studies/pdfs/CSSAnalyse225-EN.pdf