Ciccolella, C. O., Raynard, N. A., Mei, J. H., Church, D. C., & Ludwig, R. A. (2010). Symbiotic Legume Nodules Employ Both Rhizobial Exo- and Endo-Hydrogenases to Recycle Hydrogen Produced by Nitrogen Fixation. Public Library of Science.

Ciccolella, Christopher O., Nathan A. Raynard, John H-M Mei, Derek C. Church, and Robert A. Ludwig. Symbiotic Legume Nodules Employ Both Rhizobial Exo- and Endo-Hydrogenases to Recycle Hydrogen Produced By Nitrogen Fixation. Public Library of Science, 2010.

Ciccolella, Christopher O., et al. Symbiotic Legume Nodules Employ Both Rhizobial Exo- and Endo-Hydrogenases to Recycle Hydrogen Produced By Nitrogen Fixation. Public Library of Science, 2010.