1. American conference of governmental industrial hygienists: Low threshold of credibility;Castleman;Am. J. Ind. Med.,1994
2. World Health Organization, 1970. Health aspects of chemical and biological weapons: report of a WHO group of consultants.
3. Odor threshold determination of 53 odorant chemicals;Leonardos;J. Environmental Conservation Engineering,1974
4. Goldfrank, L.R., Flomenbaum, N.E., Lewin, N.A., Howland, M.A., Hoffman, R.S. and Nelson, L.S., 2002. Vital signs and toxic syndromes. Goldfrank’s Toxicologic Emergencies. New York City, NY: McGraw-Hill, pp.255-260.
5. History of chemical and biological warfare agents;Szinicz;Toxicology,2005