“Essential Metals For Nitrogen Fixation In A Free-Living N2-Fixing Bacterium: Chelation, Homeostasis And High Use Efficiency”. Environmental Microbiology 13 (6). Environmental Microbiology: 1395 - 1411. http://doi.wiley.com/10.1111/j.1462-2920.2011.02440.x.
. 2011.