Marvel, D. J., Kuldau, G., Hirsch, A., Richards, E., Torrey, J. G., & Ausubel, F. M. (1985). Conservation of nodulation genes between Rhizobium meliloti and a slow-growing Rhizobium strain that nodulates a nonlegume host.

Marvel, Deborah J., Gretchen Kuldau, Ann Hirsch, Eric Richards, John G. Torrey, και Frederick M. Ausubel. Conservation of Nodulation Genes between Rhizobium Meliloti and a Slow-growing Rhizobium Strain That Nodulates a Nonlegume Host. 1985.

Marvel, Deborah J., et al. Conservation of Nodulation Genes between Rhizobium Meliloti and a Slow-growing Rhizobium Strain That Nodulates a Nonlegume Host. 1985.