1. Achuthan C, Kumar VJR, Manju NJ, Philip R, Singh ISB (2006) Development of nitrifying bacterial consortia for immobilizing in nitrifying bioreactors designed for penaeid and non-penaeid larval rearing systems in the tropics. Indian J Marine Sci 35(3):240–248
2. Bollmann A, Laanbroek HJ (2001) Continuous culture enrichments of ammonia-oxidizing bacteria at low ammonium concentrations. FEMS Microbiol Ecol 37(3):211–221. https://doi.org/10.1016/S0168-6496(01)00163-5
3. Bothe H, Jost G, Schloter M, Ward BB, Witzel K (2000) Molecular analysis of ammonia oxidation and denitrification in natural environments. FEMS Microbiol Rev 24(5):673–690. https://doi.org/10.1111/j.1574-6976.2000.tb00566.x
4. Boyd CE (1998). Water quality for pond aquaculture. Research and Development Series No. 43. International Centre for Aquaculture and Aquatic Environments, Alabana Agricultural Experiment Station, Auburn University, Auburn
5. Bregnballe J (2015) A guide to recirculation aquaculture: an introduction to the new environmentally friendly and highly productive closed fish farming systems. Food and Agriculture Organization of the United Nations, Copenhagen