https://www.aspistrategist.org.au/prigozhins-putsch-putin-wont-forget-or-forgive/
https://henryjacksonsociety.org/wp-content/uploads/2020/12/HJS-Russian-Sanctions-Report-web.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://ec.europa.eu/info/sites/info/files/opinion-comite-adhoc-2016-10-26_en.pdf