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
https://ru.krymr.com/a/28738121.html
https://ru.krymr.com/a/28736835.html
https://www.svoboda.org/a/28735833.html
http://www.rbc.ru/newspaper/2017/09/15/59b93e819a794742c91d5a52
https://www.kommersant.ru/doc/3410533