Chen, H., Richardson, A. E., Gartner, E., Djordjevic, M. A., Roughley, R. J., & Rolfe, B. G. (1991). Construction of an Acid-Tolerant Rhizobium leguminosarum Biovar Trifolii Strain with Enhanced Capacity for Nitrogen Fixation.

Chen, Hancai, Alan E. Richardson, Elena Gartner, Michael A. Djordjevic, Rodney J. Roughley, and Barry G. Rolfe. Construction of an Acid-Tolerant Rhizobium Leguminosarum Biovar Trifolii Strain With Enhanced Capacity for Nitrogen Fixation. 1991.

Chen, Hancai, et al. Construction of an Acid-Tolerant Rhizobium Leguminosarum Biovar Trifolii Strain With Enhanced Capacity for Nitrogen Fixation. 1991.