Pott, Edison B., et al. “Beef Cattle Mineral Nutrition in the Brazilian Pantanal. III. Macronutrients Survey on the Lower Piquiri”. Pesquisa Agropecuaria Brasileira, vol. 24, no. 11, Apr. 2014, pp. 1361-8, doi:10.1590/S1678-3921.pab1989.v24.16544.