Noval, E., J. Ramón, R. García López, and J. Jiménez. “Effect of Different Doses of an Injectable Compound of Cu, Zn and Mn on Bio-Productive Indicators of Milking Cows”. Cuban Journal of Agricultural Science 50, no. 3 (December 27, 2016). Accessed April 29, 2024. https://cjascience.com/index.php/CJAS/article/view/631.