Valles de la Mora, Braulio, and Epigmenio Castillo-Gallegos. “Nitrogen Balance of Bullocks Fed Cratylia Argentea and Brachiaria Arrecta Hay”. Ecosistemas Y Recursos Agropecuarios, vol. 5, no. 15, Sept. 2018, pp. 523-36, https://doi.org/10.19136/era.a5n15.1491.