https://www.brookings.edu/wp-content/uploads/2021/04/FP_20210412_china_arctic.pdf
http://sro.sussex.ac.uk/id/eprint/110932/1/BP-70.pdf
https://www.ifri.org/sites/default/files/atoms/files/martin_ndc175_fin_parenthese_heureuse_sept2023_.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