@article{article21db9635,
title   = {Metabolizable protein supply according to the nrc (2001) for dairy cows grazing elephant grass},
author = {Voltolini, Tadeu Vinhas and Santos, Flávio Augusto Portela and Martinez, Junio Cesar and Imaizumi, Hugo and Pires, Alexandre Vaz and Penati, Marco Antonio},
year = {2008},
doi = {10.1590/s0103-90162008000200004},
journal   = {Scientia Agricola}
}