Dayrell, Milton de Souza, et al. “Factors to Be Considered in the Interpretation of Inorganic Phosphorus Values in the Blood Serum of Bovines”. Pesquisa Agropecuaria Brasileira, vol. 8, no. 6, Apr. 2014, pp. 43-47, doi:10.1590/S1678-3921.pab1973.v8.17360.