Martínez, Y., J. L. Bonilla, M. A. Sevilla, I. Matamoros, A. Botello, and M. Valdivié. “Effect of Palm Kernel (Elaeis Guineensis) Meal on Laying, Egg Quality and Economic Feasibility of Old Laying Hens”. Cuban Journal of Agricultural Science, vol. 55, no. 2, June 2021, https://www.cjascience.com/index.php/CJAS/article/view/1013.