A. A. Rodríguez, E. M. Martínez, L. C. Solórzano, and P. F. Randel, “Intake and digestibility by lambs of a diet of tropical grass and Hyparrhenia rufa hays with a probiotic containing Bacillus licheniformis and Bacillus subtilis”, JAUPR, vol. 98, no. 2, pp. 147–168, Oct. 2014.