Burguer, Peter Johann, et al. “Evaluation of in Situ Technique for Predicting Ruminal Protein Degradation”. Pesquisa Agropecuaria Brasileira, vol. 25, no. 9, Apr. 2014, pp. 1215-21, https://doi.org/10.1590/S1678-3921.pab1990.v25.19455.