https://www.washingtonexaminer.com/opinion/vladimir-putin-is-a-failed-leader
https://www.kommersant.ru/doc/5206263
http://region.expert/inside-out/
https://www.bbc.com/russian/features-60289770
https://www.svoboda.org/a/zhitj-ryadom-s-imperiey-pochemu-putin-poshel-na-obostrenie/31681325.html