Pimentel, Joabe Jobson de Oliveira, et al. “Dairy Cows Feeding With Sorghum Silage Supplemented With Concentrate”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 43, no. 3, Sept. 2013, pp. 255-61, https://doi.org/10.5216/pat.v43i3.20320.