2[1]Domenic Castignetti, Thomas C Hollocher.Heterotrophic nitrification among denitrifiers. Appl.Environ. Microbiol, 1984,47(4):620~623.
3[2]Lesley A Robertson, Ed W J Van Niel, Rob A M Torremans, et al. Simultaneous nitrification and denitrification in aerobic chemostat cultures of Thiosphaera pantotropha. Appl. Environ. Microbiol,1988,54( 11 ):2812 ~ 2818.
4[3]Christine Helmer, Sabine Kunst. Simultaneous nitrification/denitrification in an aerob-ic biofilm system. Wat. Sci. Tech., 1998,37(4~5):183~187.