https://www.radiosvoboda.org/a/news-biden-putin-call/31201889.html
https://www.rosbalt.ru/blogs/2021/04/13/1897122.html
https://analytics.hvylya.net/228760-chi-vpishetsya-zahid-za-ukrajinu-v-razi-pochatku-velikoji-viyni
https://www.wsj.com/articles/putin-and-consequences-11618266935
https://lb.ua/world/2021/04/12/482111_ataka_rossii_plan_legalizatsiya.html
https://www.inopressa.ru/article/12Apr2021/spiegel/komplize.html
https://www.kommersant.ru/doc/4770374