1. BBC News, Shanghai new year crush kills 36, 2015, [Online; accessed 1-July-2018] https://www.bbc.com/news/world-asia-china-30646918.
2. The Express Tribune, Hajj stampede death toll rises to 2177, 2015,[Online; accessed 1-July-2018] https://tribune.com.pk/story/976079/hajj-stampede-death-toll-rises-to-2177.
3. The Telegraph News, More than 1,500 Juventus fans injured in stampede in Turin, 2017, [Online; accessed 1-July-2018] https://www.telegraph.co.uk/news/2017/06/04/hundreds-juventus-fans-injured-stampede-turin.
4. The New York Times, Stampede at Mumbai railway station kills at least 22, 2017, [Online; accessed 1-July-2018] https://www.nytimes.com/2017/09/29/world/asia/mumbai-railway-stampede-elphinstone.html.
5. Al Arabiya News, Saudi Arabia may soon issue e-bracelets for all hajj pilgrims, 2015, [Online; accessed 1-July-2018]http://english.alarabiya.net/en/variety/2015/05/24/E-bracelets-on-the-way-for-hajj-pilgrims-.html.