1. Amnesty International. (2018, February 20). Syria: Relentless bombing of civilians in Eastern Ghouta amounts to war crimes. https://www.amnesty.org/en/latest/news/2018/02/syria-relentless-bombing-of-civilians-in-eastern-ghouta-amounts-to-war-crimes/
2. BBC. (2014, September 30). Donetsk airport shelling violates east Ukraine truce. https://www.bbc.com/news/world-europe-29424766
3. BBC. (2015, September). Russia launches Syria air strikes. https://www.bbc.com/news/av/world-34406364