Wheeler, K., McKelvey, W., Thorpe, L., Perrin, M., Cone, J., Kass, D., . . . Brackbill, R. (2007). Asthma Diagnosed after 11 September 2001 among Rescue and Recovery Workers: Findings from the World Trade Center Health Registry. National Institute of Environmental Health Sciences.

Wheeler, Katherine, Wendy McKelvey, Lorna Thorpe, Megan Perrin, James Cone, Daniel Kass, Mark Farfel, Pauline Thomas, và Robert Brackbill. Asthma Diagnosed After 11 September 2001 Among Rescue and Recovery Workers: Findings From the World Trade Center Health Registry. National Institute of Environmental Health Sciences, 2007.

Wheeler, Katherine, et al. Asthma Diagnosed After 11 September 2001 Among Rescue and Recovery Workers: Findings From the World Trade Center Health Registry. National Institute of Environmental Health Sciences, 2007.