Galindo, J., N. González, A. Luiz Abdalla, M. Alberto, R. C. Lucas, K. C. Dos Santos, M. R. Santos, P. Louvandini, O. Moreira, and L. Sarduy. “Effect of a Raw Saponin Extract on Ruminal Microbial Population and in Vitro Methane Production With Star Grass (Cynodon Nlemfuensis) Substrate”. Cuban Journal of Agricultural Science, vol. 50, no. 1, June 2016, https://cjascience.com/index.php/CJAS/article/view/599.