Delamuta, J. R.; Ribeiro, R. A.; Ormeño-Orrillo, E; Melo, I. S.; Martínez-Romero, E; Hungria, M (2013). "Polyphasic evidence supporting the reclassification of Bradyrhizobium japonicum group Ia strains as Bradyrhizobium diazoefficiens sp. nov". International Journal of Systematic and Evolutionary Microbiology. 63 (Pt 9): 3342–51. doi:10.1099/ijs.0.049130-0. PMID23504968.
Delamuta, J. R.; Ribeiro, R. A.; Ormeño-Orrillo, E; Melo, I. S.; Martínez-Romero, E; Hungria, M (2013). "Polyphasic evidence supporting the reclassification of Bradyrhizobium japonicum group Ia strains as Bradyrhizobium diazoefficiens sp. nov". International Journal of Systematic and Evolutionary Microbiology. 63 (Pt 9): 3342–51. doi:10.1099/ijs.0.049130-0. PMID23504968.