//www.washingtontimes.com/news/2015/sep/30/mccain-urges-obama-wake-russia-begins-airstrikes-s/ 2. Naumkin...

://www.washingtontimes.com/news/2015/sep/30/mccain-urges-obama-wake-russia-begins-airstrikes-s/
2. Naumkin, Vitaly (Sep 25, 2015) “Russian role in Syria still anyone's guess”. Al-Monitor. html:
http://www.al-monitor.com/pulse/originals/2015/09/russia-anti-terrorism-intervention-syria-isis.html
3. Apaley, Yekaterina (Sep 30, 2015) “Why Putin risks for the sake of Syria and what it can lead”. ОАО Spbnews. html:
http://saint-petersburg.ru/m/politics/apaley/341211/. (in Russian)
4. “Russia accused of killing Syrian civilians, warned over non-ISIL raids” (October 2, 2015). Al Jazeera America. html:
http://america.aljazeera.com/articles/2015/10/2/russia-accused-of-hitting-civilians-syria.html
5. “The Pentagon has compared the operation of the Russian Federation in Syria as "adding fuel to the fire"” (Sep 30, 2015). Interfax. html:
http://www.interfax.ru/world/470391. (in Russian)