A. X. dos Santos, L. das D. F. da Silva, J. A. C. Lançanova, E. L. A. Ribeiro, A. A. Cestari, and R. D. Dias, “Effects of supplementation of sunflower cake for lactating cows: productive performance and economic analysis”, Semina: Ciênc. Agrár., vol. 33, no. 6Supl2, pp. 3401–3410, Feb. 2013.