Manzano, Airton, et al. “Apparent Digestibility Coefficients of Rations Containing Alfalfa Hay and Rhodes Grass Hay for Growing Mares”. Pesquisa Agropecuaria Brasileira, vol. 13, no. 4, Apr. 2014, pp. 91-99, doi:10.1590/S1678-3921.pab1978.v13.16833.