Ramos, Maria Lucrecia Gerosa, Richard Parsons, Janet Irene Sprent, and Euan Kelvin James. 2003. “Effect of Water Stress on Nitrogen Fixation and Nodule Structure of Common Bean”. Pesquisa Agropecuaria Brasileira 38 (3):339-47. https://doi.org/10.1590/S1678-3921.pab2003.v38.6577.