Leyán, V.R., Chihuailaf, R.H. and Wittwer, F.G. 2020. Serum concentration of thyroxine and triiodothyronine in newborn calves from cows supplemented with barium selenate. Revista Colombiana de Ciencias Pecuarias. 34, 2 (Sep. 2020), 145–153. DOI:https://doi.org/10.17533/udea.rccp.v34n2a03.