1. Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction , http://www.opcw.org/chemical-weapons-convention , accessed September 2019
2. Organisation for the Prohibition of Chemical Weapons Headquarters , Johan de Wittlaan 32, 2517 JR, The Hague, The Netherlands , http://www.opcw.org , accessed Septem-ber 2019
3. Final report of the United Nations mission to investigate allegations of the use of chemical weapons in the Syrian Arab Republic , Final report , December, 2013 , https://unoda-web.s3.amazonaws.com/wp-content/uploads/2013/12/report.pdf , accessed July 2019
4. Report of the OPCW fact-finding mission in Syria regarding alleged incident of 2 August 2016 as reported in the note verbale of the Syrian Arab Republic number 69 dated 16 August 2016 , S/1444/2016, 21 Dec 2016
5. Report of the OPCW fact-finding mission in Syria regarding alleged incident in Khan Shaykhun, the Syrian Arab Republic April 2017 , S/1510/2017, 2 Jun 2017