Fujimoto, Rodrigo Yudi, et al. “Body Composition and Nutrient Efficiency Use by Pacus Fed on Ration Supplemented With Chromium”. Pesquisa Agropecuaria Brasileira, vol. 42, no. 12, Dec. 2007, pp. 1763-8, doi:10.1590/S1678-3921.pab2007.v42.7760.