Barajas, R., T. Díaz, L. R. Flores, L. Partida, Mayuly Martínez, J. J. Lomelí, y T de J. Velázquez. 2016. «Effect of Different Nitrogen Levels and Irrigation Techniques on the Ruminal Degradation of the Crude Protein of Maize». Cuban Journal of Agricultural Science 50 (2). https://cjascience.com/index.php/CJAS/article/view/616.