1. Ali, I., and P. Stewart. 2019. US. removing Turkey from F-35 program after its Russian missile defense purchase. Reuters, July 17. https://www.reuters.com/article/us-usa-turkey-security-f35-idUSKCN1UC2GL
2. Aljazeera. 2017. Final de-escalation zones agreed on in Astana. September 15. https://www.aljazeera.com/news/2017/9/15/final-de-escalation-zones-agreed-on-in-astana
3. Aljazeera. 2019. Turkey’s military operation in Syria: All the latest updates. October 23. https://www.aljazeera.com/news/2019/10/23/turkeys-military-operation-in-syria-all-the-latest-updates-9
4. Asli, A. 2019. Erdogan, trapped between two missile deals, has put Turkey in a weak spot. The Washington Post, March 6. https://www.washingtonpost.com/opinions/2019/03/06/erdogan-trapped-between-two-missile-deals-has-put-turkey-weak-spot
5. Ateş Veyis and Ece Üner’s interview with Recep Tayyip Erdoğan, Show Tv, March 7, 2019. https://tv.haberturk.com/tv/programlar/video/cumhurbaskani-ile-ozel-14-mart-2019-cumhurbaskani-recep-tayyip-erdogan/613771