https://lenta.ru/articles/2017/12/30/vizit/
https://www.gazeta.ru/comments/2017/12/28_a_11561696.shtml
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https://www.csis.org/analysis/russian-speaking-foreign-fighters-iraq-and-syria
https://echo.msk.ru/programs/beseda/2119648-echo/
http://intersectionproject.eu/ru/article/russia-europe/kak-vengriya-vybiraet-s-kem-druzhit
https://www.kommersant.ru/doc/3512737
https://www.kommersant.ru/doc/3502482
https://www.inopressa.ru/article/29Dec2017/nytimes/putin_ter.html
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/28943727.html