Gray, J. X., Zhan, H. J., Levery, S. B., Battisti, L., Rolfe, B. G., & Leigh, J. A. (1991). Heterologous exopolysaccharide production in Rhizobium sp. strain NGR234 and consequences for nodule development.

Gray, J X., H J. Zhan, S B. Levery, L. Battisti, B G. Rolfe, و J A. Leigh. Heterologous Exopolysaccharide Production in Rhizobium Sp. Strain NGR234 and Consequences for Nodule Development. 1991.

Gray, J X., et al. Heterologous Exopolysaccharide Production in Rhizobium Sp. Strain NGR234 and Consequences for Nodule Development. 1991.