Leyán, Víctor R., Ricardo H. Chihuailaf, and Fernando G. Wittwer. “Serum Concentration of Thyroxine and Triiodothyronine in Newborn Calves from Cows Supplemented With Barium Selenate”. Revista Colombiana de Ciencias Pecuarias 34, no. 2 (September 7, 2020): 145–153. Accessed February 8, 2025. https://revistas.udea.edu.co/index.php/rccp/article/view/343748.