1. https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/chinese-invention-gunpowder-explosives-and-artillery-and-their-impact-european-warfare
2. J.R. Bhardwaj, Chemical, biological, radiological, and nuclear disaster management. J. Pharm. Bioallied Sci. 2, 157–158 (2010)
3. (a)
https://en.wikipedia.org/wiki/Weapon_of_mass_destruction
, (b) B. Unal, S. Aghlani, Use of Chemical,Biological, Radiologicaland Nuclear Weaponsby Non-State Actors, Emerging trends andrisk factors; (Lloyd’s Emerging Risk Report – 2016), Chatham House, The Royal Institute of International Affairs,
https://www.lloyds.com/news-and-risk-insight/risk-reports/library/society-and-security/cbrn
4. http://www.the-trench.org/wp-content/uploads/2018/07/20180709-Vienna-Summer-School-CBRN-core-concepts.pdf
5. D. Evison, D. Hinsley, P. Rice, Chemical weapons. BMJ 324, 332–335 (2002)