J. A.  Hall, Picton, R. A., Finneran, P. S., Bird, K. E., Skinner, M. M., Jewell, D. E., and Zicker, S., 
“Dietary antioxidants and behavioral enrichment enhance neutrophil phagocytosis in geriatric Beagles.”, 
Veterinary immunology and immunopathology, vol. 113, no. 1-2, pp. 224-33, 2006.
 J. A.  Hall, Picton, R. A., Finneran, P. S., Bird, K. E., Skinner, M. M., Jewell, D. E., and Zicker, S., 
“Dietary antioxidants and behavioral enrichment enhance neutrophil phagocytosis in geriatric Beagles.”, 
Vet Immunol Immunopathol, vol. 113, no. 1-2, pp. 224-33, 2006.