Vieira, R. F., Tsai, S. M. and Teixeira, M. A. (2005) “Nodulation and symbiotic nitrogen fixation in bean with rhizobium native strains, in soil amended with sewage sludge”, Pesquisa Agropecuaria Brasileira, 40(10), pp. 1047–1050. doi: 10.1590/S1678-3921.pab2005.v40.7063.