Lira, E. F., C. J. Farfán, and H. E. Araque. “Addition of an Enzymatic Complex to a Sorghum Mixture With Different Granulometries and Its Effect on Nitrogen Digestibility and Metabolizable Energy of Birds”. Cuban Journal of Agricultural Science, vol. 49, no. 1, Feb. 2016, https://cjascience.com/index.php/CJAS/article/view/554.