Jaramillo, S. et al. 2005. Blood activity of superoxide dismutase and glutathione peroxidase in grazing dairy heifers. Pesquisa Agropecuária Brasileira. 40, 11 (nov. 2005), 1115–1121. DOI:https://doi.org/10.1590/S1678-3921.pab2005.v40.7072.