1. Bamber, M. (2021). Views: Sectarianism, Authoritarianism, and the Rise of ISIS in Iraq. Rowaq Arabi, 26 (2), 35-42. https://cihrs-rowaq.org/views-sectarianism-authoritarianism-and-the-rise-of-isis-in-iraq/?lang=en
2. Bergen, P. L. (2006). The Osama bin Laden I Know: An Oral History of al Qaeda's Leader. New York: Free Press.
3. Bunzel, C. (2015). From Paper State to Caliphate: The Ideology of the Islamic State, Brookings Project on U.S. Relations with the Islamic World Analysis Paper, no. 19. Washington, DC: The Brookings Institution. https://www.brookings.edu/wp-content/uploads/2016/06/the-ideology-of-the-islamic-state.pdf
4. Byman, D.L. (2015a, 29 April). Comparing Al Qaeda and ISIS: Different Goals, Different Targets. https://www.brookings.edu/articles/comparing-al-qaeda-and-isis-different-goals-different-targets/
5. Byman, D. (2015b). Al Qaeda, the Islamic State, and the Global Jihadist Movement: What Everyone Needs to Know. New York: Oxford University Press.