
https://www.rferl.org/a/russia-lithuania-kaliningrad-cutoff/31906501.html?utm_source=POLITICO.EU&utm_campaign=ce30c8dfb0-EMAIL_CAMPAIGN_2022_06_21_05_10&utm_medium=email&utm_term=0_10959edeb5-ce30c8dfb0-190380769

https://ukandeu.ac.uk/why-david-cameron-called-the-2016-referendum/?mc_cid=dcb6ed542c&mc_eid=815b1928ec

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