1. Aljazeera. (2022, 2 March). Russian airborne troops land in Ukraine’s Kharkiv, clashes erupt. https://www.aljazeera.com/news/2022/3/2/russian-airborne-troops-land-in-ukraines-second-city-kharkiv
2. Andersson, G. (2022, 8 March). Russia doesn’t train troops for urban warfare. It’s about to learn the consequences in Ukraine. https://www.military.com/daily-news/opinions/2022/03/08/russia-doesnt-train-troops-urban-warfare-its-about-learn-consequences-ukraine.html
3. BBC News. (2007, 3 March). Scars remain amid Chechen revival. http://news.bbc.co.uk/2/hi/programmes/from_our_own_correspondent/6414603.stm
4. Beevor, A. (2017). I saw my city die (Special report by the International Committee of the Red Cross). International Committee of the Red Cross. http://redcross.primerand.co
5. NATO Joint military operations in an urban environment. A capstone concept;The Three Swords Magazine,2019