1. Occupational exposure to diisocyanates NIOSH criteria document for a recommended standard. Publication 78-215. Washington. DC, US Department of Health, Education and Welfare.
2. Urethane polymers;Ulrich,1983
3. Isocyanate in industry;Buist;Proc Roy Soc Med,1970
4. Respiratory hypersensitivity to diisocyanates;Davies;Clin Immunol Allergy,1984
5. Documentation of the Threshold limit Value and biological exposure indices,1986