Sefrin, A. R., C. de S. Lucci, and L. Melotti. “Ruminai Degradability of Soybean Oil Meal and Coast-Cross Hay, With Canulated Steers Fed Different Ratios of Roughageconcentrate in Their Diets”. Brazilian Journal of Veterinary Research and Animal Science, vol. 34, no. 1, Feb. 1997, pp. 31-36, doi:10.11606/issn.2318-3659.v34i1p31-36.