R. Matamoros, A. Ceballos, P. A. Contreras, C. Quiroga, M. Andaur, and F. Wittwer, “Serum concentrations of triiodothyronine, thyroxine and lipid profile in dairy cows fed with a low selenium diet”, Arch med vet, vol. 40, no. 1, pp. 23–29, Apr. 2008.