Barroti, Giovane, and Ely Nahas. “Total Microbial and Phosphate-Solubilizing Population in Soil Submitted to Different Cultivation Systems”. Pesquisa Agropecuaria Brasileira, vol. 35, no. 10, Oct. 2000, pp. 2043-50, doi:10.1590/S1678-3921.pab2000.v35.5999.