Gray, G. C., McCarthy, T., Capuano, A. W., Setterquist, S. F., Olsen, C. W., Alavanja, M. C., & Lynch, C. F. (2007). Swine Workers and Swine Influenza Virus Infections. Centers for Disease Control and Prevention.

Gray, Gregory C., Troy McCarthy, Ana W. Capuano, Sharon F. Setterquist, Christopher W. Olsen, Michael C. Alavanja, and Charles F. Lynch. Swine Workers and Swine Influenza Virus Infections. Centers for Disease Control and Prevention, 2007.

Gray, Gregory C., et al. Swine Workers and Swine Influenza Virus Infections. Centers for Disease Control and Prevention, 2007.