Thomaz, Maria Cristina, Melissa Izabel Hannas, Fernanda Marcussi Tucci, Antônio João Scandolera, Maria Marta Loddi, and Fábio Enrique Lemos Budiño. “Different Protein Sources in Rations of Piglets on Activity of Trypsin and Blood Parameters”. Brazilian Journal of Veterinary Research and Animal Science 46, no. 2 (April 1, 2009): 112-121. Accessed December 1, 2020. http://www.revistas.usp.br/bjvras/article/view/26757.