Carvalho, Gleidson Giordano Pinto de, et al. “Nutritive Value of Sugarcane Bagasse Ammoniated With Four Urea Doses”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 1, Jan. 2006, pp. 125-32, doi:10.1590/S1678-3921.pab2006.v41.7114.