https://www.politico.com/news/magazine/2025/12/21/france-europe-security-trump-00700889
https://www.crisisgroup.org/europe-central-asia/eastern-europe/ukraine/b96-answering-four-hard-questions-about-russias-war-ukraine
https://www.ifw-kiel.de/fileadmin/Dateiverwaltung/IfW-Publications/-ifw/Kiel_Working_Paper/2022/KWP_2218_Which_countries_help_Ukraine_and_how_/KWP_2218_Trebesch_et_al_Ukraine_Support_Tracker.pdf
http://www.sgi-network.org/2017/About