9Woses C R,Weisburg W G,Paster B J.The phylogeny of purple baeteria:the alpha subdivision[J].Systematic and Applied Microbiology,1984,5(3):327-336.
10De Boer W,Gunnewiek P J,Veenhuis M,et al.Nitrification at low pH by aggregated chemolithotrophic bacteria[J].Applied and Environmental Microbiology,1991,57(12):3600-3604.