https://www.bbc.com/russian/news-59766531
https://www.kommersant.ru/doc/5143341
https://www.rbc.ru/newspaper/2021/12/24/61c34e3f9a79470ec7ba9221
https://www.ng.ru/armies/2021-12-21/2_8332_missile.html
https://www.kommersant.ru/doc/5141673
http://region.expert/bashkorts/
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