https://www.kommersant.ru/doc/3487741
https://www.kommersant.ru/doc/3487740
https://www.kommersant.ru/doc/3489374
What you need to know.
http://www.kasparov.ru/material.php?id=5A26D53822D09
https://www.inopressa.ru/article/04Dec2017/wp/nuclear1.html
A mysterious radiation cloud is a disturbing echo of Chernobyl.
Foreign Minister Sergey Lavrov's response to Washington's statement on the need to cut ties with Pyongyang was negative.
http://www.aljazeera.com/news/2017/11/russia-rejects-call-cut-ties-north-korea-171130104441729.html
https://republic.ru/posts/88054
http://www.kasparov.ru/material.php?id=5A1FF4ABDC6C7