Meira Jr, E. B. de S., H. Rizzo, F. J. Benesi, and L. Gregory. “Influence of Age and Sex on Total Serum Protein and Albumin and Aspartato-Aminotransferase and Gama-Glutamiltransferase Serum Activities on Santa Inês Sheep”. Brazilian Journal of Veterinary Research and Animal Science, vol. 46, no. 6, Dec. 2009, pp. 448-54, doi:10.11606/S1413-95962009000600003.