Kumar R.; Bhatia R.; Kukreja K.; Behl R. K.; Dudeja S. S.; Narula N. (2007). "Establishment of Azotobacter on plant roots: chemotactic response, development and analysis of root exudates of cotton (Gossypium hirsutum L.) and wheat (Triticum aestivum L.)". Journal of Basic Microbiology. 47 (5): 436–439. doi:10.1002/jobm.200610285. PMID17910096. S2CID30574266.
Baillie A.; Hodgkiss W.; Norris J. R. (1962). "Flagellation of Azotobacter spp. as Demonstrated by Electron Microscopy". Journal of Applied Microbiology. 25 (1): 116–119. doi:10.1111/j.1365-2672.1962.tb01126.x.
Robson R. L.; Eady R. R.; Richardson T. H.; Miller R. W.; Hawkins M.; Postgate J. R. (1986). "The alternative nitrogenase of Azotobacter chroococcum is a vanadium enzyme". Nature. 322 (6077): 388–390. Bibcode:1986Natur.322..388R. doi:10.1038/322388a0. S2CID4368841.
Robson R. L.; Eady R. R.; Richardson T. H.; Miller R. W.; Hawkins M.; Postgate J. R. (1986). "The alternative nitrogenase of Azotobacter chroococcum is a vanadium enzyme". Nature. 322 (6077): 388–390. Bibcode:1986Natur.322..388R. doi:10.1038/322388a0. S2CID4368841.
Kumar R.; Bhatia R.; Kukreja K.; Behl R. K.; Dudeja S. S.; Narula N. (2007). "Establishment of Azotobacter on plant roots: chemotactic response, development and analysis of root exudates of cotton (Gossypium hirsutum L.) and wheat (Triticum aestivum L.)". Journal of Basic Microbiology. 47 (5): 436–439. doi:10.1002/jobm.200610285. PMID17910096. S2CID30574266.
Kumar R.; Bhatia R.; Kukreja K.; Behl R. K.; Dudeja S. S.; Narula N. (2007). "Establishment of Azotobacter on plant roots: chemotactic response, development and analysis of root exudates of cotton (Gossypium hirsutum L.) and wheat (Triticum aestivum L.)". Journal of Basic Microbiology. 47 (5): 436–439. doi:10.1002/jobm.200610285. PMID17910096. S2CID30574266.
Robson R. L.; Eady R. R.; Richardson T. H.; Miller R. W.; Hawkins M.; Postgate J. R. (1986). "The alternative nitrogenase of Azotobacter chroococcum is a vanadium enzyme". Nature. 322 (6077): 388–390. Bibcode:1986Natur.322..388R. doi:10.1038/322388a0. S2CID4368841.
springer.com
George M. Garrity, ed. (2005). "Part B: The Gammaproteobacteria". Bergey's Manual of Systematic Bacteriology. Vol. The Proteobacteria (2 ed.). New York: Springer. ISBN978-0-387-95040-2. Archived from the original on 2010-01-31. Retrieved 2017-08-28.
George M. Garrity, ed. (2005). "Part B: The Gammaproteobacteria". Bergey's Manual of Systematic Bacteriology. Vol. The Proteobacteria (2 ed.). New York: Springer. ISBN978-0-387-95040-2. Archived from the original on 2010-01-31. Retrieved 2017-08-28.