de Oliveira Junior, R.C. et al. 2004. Nutrient digestibility in cattle diet with urea or starea replacing soybean meal. Pesquisa Agropecuaria Brasileira. 39, 2 (Feb. 2004), 173–178. DOI:https://doi.org/10.1590/S1678-3921.pab2004.v39.6753.