Leyan, V., Wittwer, F., Contreras, P.A. and Kruze, J. 2004. Serum and colostrum immunoglobulin concentrations from selenium deficient cows and in the blood of their calves. Archivos de Medicina Veterinaria. 36, 2 (Dec. 2004), 155–162. DOI:https://doi.org/10.4067/S0301-732X2004000200006.