https://novayagazeta.ru/articles/2021/12/15/taina-podlosti-na-ntv
https://carnegie.ru/commentary/85935
https://www.nytimes.com/2021/12/05/world/europe/putin-russia-ukraine-troops.html
https://www.svoboda.org/a/arifmetika-moroznoy-bitvy-mog-li-vermaht-vzyatj-moskvu/31586990.html