Kozloski, Gilberto Vilmar, et al. “Body Weight Gain and Feed Intake in Calves Supplemented With Urea or Meat Meal”. Pesquisa Agropecuaria Brasileira, vol. 31, no. 7, July 1996, pp. 529-32, doi:10.1590/S1678-3921.pab1996.v31.4515.