Lovatto, Naglezi de Menezes, et al. “Effects of Diets Containing Vegetable Protein Concentrates on Performance and Activity of Digestive Enzymes in Silver Catfish (Rhamdia Quelen)”. Semina: Ciências Agrárias, vol. 35, no. 2, Apr. 2014, pp. 1071-82, doi:10.5433/1679-0359.2014v35n2p1071.