1. Almukhtar, S., Wallace, T.; Watkins, D., 2016. ISIS has Lost Many of the Key Places It Once Controlled. The New York Times. http://www.nytimes.com/interactive/2016/06/18/ world/middleeast/isis-control-places-cities.html?_r=0, 21.08.2016.
2. Besenyő, J., 2015. Not the invention of ISIS: Terrorists among immigrants. Journal of Security and Sustainability Issues, Volume 5, Number 1, pp. 5–20.
3. Glenn, C. Timeline: Rise and Spread of the Islamic State https://www.wilsoncenter.org/ article/timeline-rise-and-spread-the-islamic-state (last visited:21.08.2016.)
4. Blanchard, C. M.; Humud, C. E., 2016. The Islamic State and U.S. policy. https://fas.org/ sgp/crs/mideast/R43612.pdf, 06.12.2015.
5. Capelouto, S.; Gul, T., 2015. Turkey arrests hundreds of suspected terrorists, Prime Minister says. CNN. http://edition.cnn.com/2015/07/25/middleeast/turkey-syria-isis- attacks/, 07.02.2016.