https://www.vedomosti.ru/politics/articles/2017/12/30/746984-verhovnii-sud-priznal-zakonnim
https://www.kommersant.ru/doc/3502556
Download the Report
https://www.csis.org/analysis/russian-speaking-foreign-fighters-iraq-and-syria
https://www.inopressa.ru/article/29Dec2017/nytimes/putin_ter.html
http://www.kasparov.ru/material.php?id=5A4239226148D
https://www.kommersant.ru/doc/3512206
https://www.kommersant.ru/doc/3511570
Vladimir V. Putin, who is running for a fourth term as Russia’s president, has burnished his reputation for being tough on extremists.
https://ru.krymr.com/a/28944363.html