Grundmann, GL; Neyra, M; Normand, P (2000). "High-resolution phylogenetic analysis of NO2--oxidizing Nitrobacter species using the rrs-rrl IGS sequence and rrl genes.". International journal of systematic and evolutionary microbiology50 (Pt 5): 1893–8. PMID11034501. doi:10.1099/00207713-50-5-1893.
Grundmann, GL; Neyra, M; Normand, P (2000). "High-resolution phylogenetic analysis of NO2--oxidizing Nitrobacter species using the rrs-rrl IGS sequence and rrl genes.". International journal of systematic and evolutionary microbiology50 (Pt 5): 1893–8. PMID11034501. doi:10.1099/00207713-50-5-1893.