Marrero, Y., C. A. Montoya, O. Ruiz, A. Elías, and N. Madera. “Growth of Pichia Guilliermondii Strain Levica 27 in Different Energy Sources and Nitrogen”. Cuban Journal of Agricultural Science, vol. 49, no. 1, Feb. 2016, https://cjascience.com/index.php/CJAS/article/view/546.