窒素循環
↑ “Nitrogen Fixation In Methanogens: The Archaeal Perspective” (英語). Current Issues in Molecular Biology. (2000). doi:10.21775/cimb.002.125. https://www.caister.com/cimb/abstracts/v2/125.html.
↑ Dos Santos, Patricia C; Fang, Zhong; Mason, Steven W; Setubal, João C; Dixon, Ray (2012-12). “Distribution of nitrogen fixation and nitrogenase-like sequences amongst microbial genomes” (英語). BMC Genomics 13 (1): 162. doi:10.1186/1471-2164-13-162. ISSN 1471-2164. PMC 3464626. PMID 22554235. https://bmcgenomics.biomedcentral.com/articles/10.