Pereira, João Carlos, et al. “Influence of Antibiosis Produced by Actinomycetes on Strains of <i>Bradyrhizobium< i> Spp. On Soybean Nodulation”. Pesquisa Agropecuaria Brasileira, vol. 34, no. 1, Jan. 1999, pp. 99-108, doi:10.1590/S1678-3921.pab1999.v34.5139.