1. Chemical Weapon Convention;Organization for the Prohibition of Chemical Weapons,2018
2. Natural and Selected Synthetic Toxins: Biological Implications;Seto,1999
3. Quantitative analysis of O-isopropyl methylphosphonic acid in serum samples of Japanese citizens allegedly exposed to sarin: estimation of internal dosage;Noort;Arch. Toxicol.,1998
4. Public Security Intelligence Agency, http://www.moj.go.jp/psia/index.html (Accessed 18 May 2018).
5. United Nations Mission to Investigate Allegations of the Use of Chemical Weapons in the Syrian Arab Republic: Report on the Alleged Use of Chemical Weapons in the Ghouta Area of Damascus on 21 August 2013, http://www.un.org/zh/focus/northafrica/cwinvestigation.pdf (Accessed 18 May 2018).