5EC. EU focus on clean water. ISBN 92-828-4836-1, Belgium, 1999.
6ZHEW. DOKHAVEN on reflection. P O Box 469, 3300 AL Dordrecht, the Netherlands, 2000.
7Mulder A,van de Graaf A A,Robertson L A,et al.Anaerobic ammonium oxidation discovered in a denitrifying fluidized bed reactor[J].FEMS Microbiol Ecol,1995,16(3):177-184.
8van de Graaf A A,de Bruijn P,Robertson L A,et al.Autotrophic growth of anaerobic ammonium-oxidizing micro-organisms in a fluidized bed reactor[J].Microbiology (UK),1996,142(8):2187 -2196.
9Strous M,Fuerst J A,Karmer E H M,et al.Missing lithotroph identified as new planctomycete[J].Nature,1999,400(29):446 -449.
10Mulder A.Anoxic ammonia oxidation of wastewater[P].Netherlands:327184.11 p,1989.