https://www.rosbalt.ru/russia/2021/12/29/1937757.html
https://theins.ru/opinions/pavel-chikov/247514
https://edition.cnn.com/2021/12/19/politics/joe-biden-russia-ukraine-obama-2014/index.html
https://24tv.ua/nagadali-pro-budapeshtskiy-memorandum-novini-rosiyi-i-ukrayini_n1822928
https://novayagazeta.ru/articles/2021/12/17/napadete-nakazhem
https://www.ng.ru/world/2021-12-16/1_8329_sanctions.html