R. F. Vieira, S. M. Tsai, and M. A. Teixeira, “Nodulation and symbiotic nitrogen fixation in bean with rhizobium native strains, in soil amended with sewage sludge”, PAB, vol. 40, no. 10, pp. 1047–1050, Oct. 2005, doi: 10.1590/S1678-3921.pab2005.v40.7063.