Dixon R and Kahn D «Genetic regulation of biological nitrogen fixation». Nat Rev Microbiol, 2, 8, 2004, pàg. 621–31. DOI: 10.1038/nrmicro954. PMID: 15263897.
Beckwith, J, Tjepkema, J D, Cashon, R E, Schwintzer, C R, Tisa, L S «Hemoglobin in five genetically diverse Frankia strains». Can J Microbiol, 48, 12, 2002, pàg. 1048–1055. DOI: 10.1139/w02-106. PMID: 12619816.
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Dixon R and Kahn D «Genetic regulation of biological nitrogen fixation». Nat Rev Microbiol, 2, 8, 2004, pàg. 621–31. DOI: 10.1038/nrmicro954. PMID: 15263897.
Beckwith, J, Tjepkema, J D, Cashon, R E, Schwintzer, C R, Tisa, L S «Hemoglobin in five genetically diverse Frankia strains». Can J Microbiol, 48, 12, 2002, pàg. 1048–1055. DOI: 10.1139/w02-106. PMID: 12619816.