1. Aberbach, J. D., & Rockman, B. A. (1976). Clashing beliefs within the executive branch: The Nixon administration bureaucracy. The American Political Science Review, 70(2), 456–468.
2. Andrew, C., Aldrich, R. J., & Wark, W. (Eds.). (2020). Secret intelligence: A reader. New York: Routledge.
3. Arms Control Association. (2020, May). Timeline of the Syrian chemical weapons activity, 2012–2020. https://www.armscontrol.org/factsheets/Timeline-of-Syrian-Chemical-Weapons-Activity.
4. Asthana, A., Roth, A., Harding, L., & MacAskill, E. (2018, March 12). May issues ultimatum to Moscow over Salisbury poisoning. The Guardian. https://www.theguardian.com/uk-news/2018/mar/12/russia-highly-likely-to-be-behind-poisoning-of-spy-says-theresa-may.
5. Australian Federal Police. (2019, November). MH17 investigation: New call for witnesses on who commanded deployment of the missile. AFP.org.au. https://www.afp.gov.au/news-media/media-releases/mh17-investigation-new-call-witnesses-who-commanded-deployment-missile.