http://carnegie.ru/2017/09/17/ru-pub-73133
https://newtimes.ru/articles/detail/119277
http://www.ng.ru/week/2017-09-17/8_7075_society.html
https://ru.krymr.com/a/28739401.html
https://ru.krymr.com/a/28739167.html
http://www.dsnews.ua/world/da-duraki-oni-kogda-putin-otsenit-matildu--16092017140000
https://republic.ru/posts/86415
The country is no stranger to bomb threats, but it has never experienced so many at once.
https://worldview.stratfor.com/article/string-bomb-threats-triggers-evacuations-across-russia
http://graniru.org/opinion/portnikov/m.264013.html
https://www.inopressa.ru/article/15Sep2017/wp/putin.html