https://ru.krymr.com/a/vitaliy-portnikov-krym-diktuyet-pravila/31630895.html
https://hvylya.net/analytics/244375-ultimatum-putina-i-rossiysko-ukrainskaya-voyna-2022
https://www.bbc.com/russian/news-59769752
https://www.rbc.ru/newspaper/2021/12/24/61c34e3f9a79470ec7ba9221
https://24tv.ua/nagadali-pro-budapeshtskiy-memorandum-novini-rosiyi-i-ukrayini_n1822928
http://www.kasparov.ru/material.php?id=61BCB3221DD2B