https://www.dw.com/ru/pytki-v-sizo-i-kolonijah-v-rossii-kak-sistema-otstaivaet-svoih/a-60577106
https://www.bbc.com/russian/features-59778079
https://www.nytimes.com/2021/11/25/us/politics/biden-putin-russia-ukraine.html
https://ru.krymr.com/a/rossiya-psevdofederalizm-i-krym/30517705.html