https://www.washingtonexaminer.com/opinion/vladimir-putin-is-a-failed-leader
https://www.kommersant.ru/doc/5206263
http://region.expert/inside-out/
https://www.svoboda.org/a/zhitj-ryadom-s-imperiey-pochemu-putin-poshel-na-obostrenie/31681325.html
http://www.kasparov.ru/material.php?id=61FE4D36B362B§ion_id=444F8A447242B