1. Final Report of the National Commission on Terrorist Attacks Upon the United States. The 9/11 Commission report. Available at: http://www.columbia.edu/cu/libraries/projects/gpo/fullreport.pdf. Accessed March 28, 2014.
2. Evaluation report: EPA's response to the World Trade Center collapse: challenges, successes, and areas for improvement;United States Environmental Protection Agency,2003
3. New York City Fire Department. New York City Fire Department's Deputy Assistant Chief Report No. 2003-P-000124.
4. National Institute of Environmental Health Sciences (NIEHS) Worker Education and Training Program (WETP) response to the World Trade Center disaster: initial WETP grantee response and preliminary assessment of training needs;Elisburg,2001
5. Lippy B. Respiratory protection at the World Trade Center: lessons from the other disaster. January 2002.