J. A.  Hall, Van Saun, R. J., Nichols, T., Mosher, W., and Pirelli, G., 
“Comparison of selenium status in sheep after short-term exposure to high-selenium-fertilized forage or mineral supplement.”, 
Small Ruminant Research 2009;82:40-45., vol. 82, pp. 40-45, 2009.
 J. A.  Hall, Bailey, D. P., Thonstad, K. N., and Van Saun, R. J., 
“Effect of parenteral selenium administration to sheep on prevalence and recovery from footrot.”, 
Journal of veterinary internal medicine / American College of Veterinary Internal Medicine, vol. 23, no. 2, pp. 352-8, 2009.
 J. A.  Hall, Bailey, D. P., Thonstad, K. N., and Van Saun, R. J., 
“Effect of parenteral selenium administration to sheep on prevalence and recovery from footrot.”, 
J Vet Intern Med, vol. 23, no. 2, pp. 352-8, 2009.