https://www.kp.ru/daily/27259/4390644/
https://www.radiosvoboda.org/a/news-sbu-botoferma/31179370.html
https://www.radiosvoboda.org/a/news-merkel-makron-putin-donbas/31179505.html
https://www.radiosvoboda.org/a/putin-plots-ukraine-peace-talks-without-ukraine/31179737.html
https://www.nytimes.com/2021/03/30/world/europe/ukraine-russia-fighting.html
https://www.radiosvoboda.org/a/krym-voienna-stratehia-ukrainy-ahresia-rosii/31178327.html
https://www.radiosvoboda.org/a/rosiyska-tehnika-na-donbasi/31171124.html