9[4]P.L.Bond,R.Erhart,M.Wagner,J.R.Keller,and L.L.Blackall.Identification of Some of the Major Groups of Bacteria in Efficient and Nonefficient Biological Phosphorus Removal Activated Sludge Systems[J].Appl.Environ.Microbiol,1999,65(9):4077-4084.
10[5]Brosius.J,Dull.T.J,Sleeter.D.D and Noller.H.F.Gene organization and primary structure of a ribosomal operon from Escherichia coli[J].J.Mol.Biol,1981,148:107-127.