[[1] Alexey Klyonski, „The Revival Process 1984–1989 “– Volume 1, Sofia, 2009.]Search in Google Scholar
[[2] Dimov S. Assessing the threat of islamically motivated terrorism in Bulgaria, Calhoun: The NPS Institutional Archive 2015-12.]Search in Google Scholar
[[3] United States’ Department of State, “Country Reports on Terrorism 2013,” Country Report: Europe Overview, chapter 2, 2014.]Search in Google Scholar
[[4] United States’ Department of State, “Country Reports on Terrorism 2014,” Country Report: Europe Overview, chapter 2, 2015.]Search in Google Scholar
[[5] Dusica Tomovic, “Hundreds of Balkan jihadists have joined ISIS,” BalkanInsight, September 17, 2014, accessed November 20, 2014.]Search in Google Scholar
[[6] Alexi Alexiev, “The end of Erdogan’s Islamization,” National Review Online, 2014.]Search in Google Scholar