Vald?z-Garc?a, Y. S., J. I. Aguilera-Soto, A. Barreras, A. Estrada-Angulo, A. G?mez-Vazquez, A. Plascencia, J. J. Reyes, J. Stuart, and N. G. Torrentera. “Growth Performance and Carcass Characteristics in Finishing Feedlot Heifers Fed Different Levels of Chromium-Enriched Live Yeast or Fed Zilpaterol Hydrochloride”. Cuban Journal of Agricultural Science, vol. 45, no. 4, Nov. 2011, https://cjascience.com/index.php/CJAS/article/view/94.