Harrington, R. D., Herrmann-Hoesing, L. M., White, S. N., O'Rourke, K. I., & Knowles, D. P. (2009). Ovine progressive pneumonia provirus levels are unaffected by the prion 171R allele in an Idaho sheep flock. BioMed Central.

Harrington, Robert D., Lynn M. Herrmann-Hoesing, Stephen N. White, Katherine I. O'Rourke, and Donald P. Knowles. Ovine Progressive Pneumonia Provirus Levels Are Unaffected By the Prion 171R Allele in an Idaho Sheep Flock. BioMed Central, 2009.

Harrington, Robert D., et al. Ovine Progressive Pneumonia Provirus Levels Are Unaffected By the Prion 171R Allele in an Idaho Sheep Flock. BioMed Central, 2009.