Marrero, Yoandra, O. Ruiz, A. Corrales, O. Jay, Juana Galindo, Yamicela Castillo, and Norma madera. 2014. “In Vitro Gas Production of Fibrous Substrates With the Inclusion of Yeast”. Cuban Journal of Agricultural Science 48 (2). https://cjascience.com/index.php/CJAS/article/view/468.