https://media.defense.gov/2018/Feb/02/2001872890/-1/-1/1/EXECUTIVE-SUMMARY-TRANSLATION-FRENCH.PDF
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
https://www.zora.uzh.ch/id/eprint/168933/1/From_welfare_to_warfare_Voth.pdf
https://www.theatlantic.com/ideas/archive/2021/08/kabul-airport-bombing-afghanistan/619906/?utm_source=newsletter&utm_medium=email&utm_campaign=27%2F08%2F21