Pereira, E.S. et al. 2010. Determination of the proteins and carbohydrates fractions and estimative of the energy value of forages and by-products in Brazilian Northeast. Semina: Ciências Agrárias. 31, 4 (Dec. 2010), 1079–1094. DOI:https://doi.org/10.5433/1679-0359.2010v31n4p1079.