Milián, G., M. Rodríguez, D. Dias, A. I. Rondón, M. L. Pérez, R. Bocourt, Y. Portilla, and A. Beruvides. “Evaluation of the Zootechnical Additive SUBTILPROBIO® C-31 on Feeding of Laying Hens in a Commercial Production Unit”. Cuban Journal of Agricultural Science, vol. 53, no. 2, June 2019, https://cjascience.com/index.php/CJAS/article/view/885.