ZoBell, D. R., E. K. Okine, K. C. Olson, R. D. Wiedmeier, L. A. Goonewardene and C. Stonecipher
Journal of Animal and Veterinary Advances 3 ( 12 ): 804 - 809 , 2004
D.R. ZoBell, K.C. Olson, R.D. Wiedmeier, C. Stonecipher and C. Kim Chapman
Journal of Animal and Veterinary Advances 5 ( 12 ): 1117 - 1120 , 2006