Hovde, C. J., Austin, P. R., Cloud, K. A., Williams, C. J., & Hunt, C. W. (1999). Effect of Cattle Diet on Escherichia coli O157: H7 Acid Resistance. American Society for Microbiology.

Hovde, Carolyn J., Paula R. Austin, Karen A. Cloud, Christopher J. Williams, and Carl W. Hunt. Effect of Cattle Diet On Escherichia Coli O157: H7 Acid Resistance. American Society for Microbiology, 1999.

Hovde, Carolyn J., et al. Effect of Cattle Diet On Escherichia Coli O157: H7 Acid Resistance. American Society for Microbiology, 1999.