Nielsen, P. H., Daims, H., & Lemmer, H. (2009). FISH Handbook for biological wastewater treatment: Identification and quantification of microorganisms in activated sludge and biofilms by FISH (1a. ed.). IWA.

Nielsen, Per Halkjaer, Holger Daims, and Hilde Lemmer. FISH Handbook for Biological Wastewater Treatment: Identification and Quantification of Microorganisms in Activated Sludge and Biofilms by FISH. 1a. ed. Londres: IWA, 2009.

Nielsen, Per Halkjaer, et al. FISH Handbook for Biological Wastewater Treatment: Identification and Quantification of Microorganisms in Activated Sludge and Biofilms by FISH. 1a. ed. IWA, 2009.