Favoretto, Vanildo, et al. “Stocking Rate and Nitrogen or Legumes on Beef Steers Live Weight Gain from Guinea Grass Pastures”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 1, Apr. 2014, pp. 79-84, doi:10.1590/S1678-3921.pab1983.v18.15158.