Lucci, Carlos de Sousa, et al. “Ruminal Degradability in Dry and Lactating Cows, With 70% or 50% of Roughage As Dry Matter Diets”. Brazilian Journal of Veterinary Research and Animal Science, vol. 35, no. 3, Jan. 1998, pp. 127-33, https://doi.org/10.1590/S1413-95961998000300007.