Imaizumi, H., Santos, F.A.P., Pires, A.V., Nussio, C.M.B., Barnabé, Éberson C. and Juchem, S. de O. 2008. Evaluation of different protein sources and content on rumen fermentation and blood parameters performance of holstein cows’ lactation. Acta Scientiarum. Animal Sciences. 24, (Apr. 2008), 1031-1037. DOI:https://doi.org/10.4025/actascianimsci.v24i0.2522.