Galindo, J.; Marrero, Y.; Gonz?lez, N.; Sosa, A.; Miranda, A. L.; Aldana, A. I.; Moreira, O.; Bocourt, R.; Delgado, D.; Torres, V.; Sarduy, L.; Noda, A. Effect of Preparations With the Viable Yeasts Saccharomyces Cerevisiae and LEVICA-25 on Methanogens and in Vitro Ruminal Methanogenesis. Cuban J. Agric. Sci. 2010, 44.