R. Hidayat, H. Setiyatwan, R. L. Balia, L. Suryaningsih, W. S. Putranto, and G. L. Utama, “Effect of Undegraded Dietary Protein, Probiotic, and Premixes in Complete Rations on Fat-Tailed Sheep Productivity”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 11, no. 6, pp. 2167–2173, Dec. 2021.