Acosta, S. and Dalel, L. (2011) “Technical and economic comparison of the use of zeranol plus ivermectin versus ivermectin on cattle in the final stages of fattening, in the poorly drained regions of the Orinoco basin in Casanare, Colombia”, Spei Domus, 7(15). Available at: https://revistas.ucc.edu.co/index.php/sp/article/view/607 (Accessed: 5 July 2026).