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Sheppard, Samuel, Frances M. Colles, Tracey A. Jones, Noel D. McCarthy, Alison J. Cody, Kate E. Dingle, Marian S. Dawkins, and Martin C. J. Maiden. "Campylobacterinfection of Broiler Chickens in a Free-range Environment." Environmental Microbiology 10, no. 8 (2008): 2042-2050.

Sheppard, Samuel, et al. "Campylobacterinfection of Broiler Chickens in a Free-range Environment." Environmental Microbiology 10.8 (2008): 2042-2050.