1. The Raise and Fall of ISIL Explained | ISIL | Al Jazeera
https://www.aljazeera.com/indepth/features/2017/06/rise-fall-isil-explained-170607085701484.html
2. Die Zeit Irak-Konflikt: Iran soll Eliteeinheiten in den Irak entsandt haben | ZEIT ONLINE
https://www.zeit.de/politik/ausland/2014-06/irak-iran-revolutionsgarden-quds-brigaden
3. ISIL: Rising Power in Iraq and Syria
https://www.aljazeera.com/news/middleeast/2014/06/isil-eminent-threat-iraq-syria-20146101543970327.html
4. Socio-Political Order and Security in the Arab World: From Regime Security to Public Security;Krieg,2017
5. Mass Graves, Missing Children: Brutality in Sinjar
http://www.cnn.com/2016/01/12/middleeast/nima-elbagir-sinjar-mass-graves/index.html