Authors: Aakra, A Utaker, JB Pommerening-Roser, A Koops, HP Nes, IF

Citation: A. Aakra et al., Detailed phylogeny of ammonia-oxidizing bacteria determined by rDNA sequences and DNA homology values, INT J SY EV, 51, 2001, pp. 2021-2030

Authors: Aakra, A Utaker, JB Nes, IF Bakken, LR

Citation: A. Aakra et al., An evaluated improvement of the extinction dilution method for isolation of ammonia-oxidizing bacteria, J MICROB M, 39(1), 1999, pp. 23-31

Authors: Aakra, A Utaker, JB Nes, IF

Citation: A. Aakra et al., RFLP of rRNA genes and sequencing of the 16S-23S rDNA intergenic spacer region of ammonia-oxidizing bacteria: a phylogenetic approach, INT J SY B, 49, 1999, pp. 123-130