http://altanalyses.org/en/2021/09/13/ever-greater-failure-eu-energy-policy/
http://www.kasparov.ru/material.php?id=613B34A79C381§ion_id=46641456E93EE
https://analytics.hvylya.net/237377-istoricheskie-oshibki-vladimira-putina
https://www.bbc.com/russian/features-58508091
https://www.bbc.com/russian/news-58507110