Hidayat, Rahmat, et al. “Effect of Macronutrient Needs on Digestibility and Average Daily Gain of Sheep (Ovisaries Var. Padjadjaran, Family Bovidae)”. International Journal on Advanced Science, Engineering and Information Technology, vol. 9, no. 5, Oct. 2019, pp. 1618-23, doi:10.18517/ijaseit.9.5.9292.