http://www.kasparov.ru/material.php?id=61B49F42A54FD§ion_id=444F8A447242B
https://carnegie.ru/commentary/85935
https://www.nytimes.com/2021/12/05/world/europe/putin-russia-ukraine-troops.html
https://www.rosbalt.ru/blogs/2021/12/02/1933799.html