Villa, Nestor Alonso, Alejandro Ceballos, Douglas Ceron, e Carlos Alberto Serna. 1999. “Clinical Biochemistry Values in Serum from Grazing Brahman Cows”. Pesquisa Agropecuária Brasileira 34 (12):2339-43. https://doi.org/10.1590/S1678-3921.pab1999.v34.5572.