Dionisi, H. M., Layton, A. C., Harms, G., Gregory, I. R., Robinson, K. G., & Sayler, G. S. (2002). Quantification of Nitrosomonas oligotropha-Like Ammonia-Oxidizing Bacteria and Nitrospira spp. from Full-Scale Wastewater Treatment Plants by Competitive PCR. American Society for Microbiology.

Dionisi, Hebe M., Alice C. Layton, Gerda Harms, Igrid R. Gregory, Kevin G. Robinson, and Gary S. Sayler. Quantification of Nitrosomonas Oligotropha-Like Ammonia-Oxidizing Bacteria and Nitrospira Spp. From Full-Scale Wastewater Treatment Plants By Competitive PCR. American Society for Microbiology, 2002.

Dionisi, Hebe M., et al. Quantification of Nitrosomonas Oligotropha-Like Ammonia-Oxidizing Bacteria and Nitrospira Spp. From Full-Scale Wastewater Treatment Plants By Competitive PCR. American Society for Microbiology, 2002.