1. Al Jazeera. 2018. “UN Deadlock as Rival Resolutions on Syria Attack Probe Fail.” April 10. Accessed May 5 2018. https://www.aljazeera.com/news/2018/04/russia-vetoes-resolution-syria-chemical-weapons-probe-180410193956669.html
2. Banks S. 2017. “Syria Chemical Attack: Sarin Nerve Gas Was Used on Khan Sheikhoun Confirms International Watchdog.” The Independent June 30. Accessed July 4 2017. http://www.independent.co.uk/news/world/syria-chemical-attack-sarin-nerve-gas-confirm-khan-sheikhoun-international-watchdog-idlib-province-a7815916.html
3. BBC. 2016. “Syria: The Story of the Conflict.” March 11. Accessed May 5 2018. http://www.bbc.co.uk/news/world-middle-east-26116868
4. UN intervention and the duration of international crises
5. Berdal, M. 2012. “Reflections on Post-War Violence in Peacebuilding.” In The Peace in between: Post-War Violence and Peacebuilding, edited by A. Suhrke and M. Berdal, 309–326. Oxford: Routledge.