Appunu C., RavindraKumar V., Sreenivasa V., Manjunatha T., Mahadevaiah C., Sasirekha N., Prabavathy V.R., Nair S..  2014.  Symbiotic effect of Bradyrhizobium yuanmingense isolates over Bradyrhizobium japonicum with soybean. Legume Research. 38(2):270.

Appunu C., Sasirekha N., Prabavathy V.R., Nair S..  2009.  A significant proportion of indigenous rhizobia from India associated with soybean (Glycine max L.) distinctly belong to Bradyrhizobium and Ensifer genera. Biol Fertil Soils. :63.