1. J. B. Tucker , War of Nerves: Chemical Warfare from World War I to Al-Qaeda , Pantheon Books , New York , 2006
2. K. Coleman , A History of Chemical Warfare Pelgrave , Macmillan, Basingstoke , 2005
3. E. Croddy , Chemical and Biological Warfare , Springer-Verlag , New York , 2001
4. J. Paxman and R.Harris , A Higher Form of Killing: The Secret History of Chemical and Biological Warfare , Arrow , London , 2001
5. J. L. McWilliams and R. J.Steel , Gas! The Battle for Ypres, 1915 , Vanwell Publishing Limited , Canada , 1985