https://www.levada.ru/2021/12/14/obostrenie-v-donbasse/
https://carnegie.ru/commentary/85956
https://www.ng.ru/education/2021-12-08/8_8321_children.html
https://carnegie.ru/commentary/85935
https://www.nytimes.com/2021/12/05/world/europe/putin-russia-ukraine-troops.html