Hara, F.A. dos S. and de Oliveira, L.A. 2005. Physiological and ecological characteristics of rhizobia isolates from acid soils of Iranduba, Amazonas. Pesquisa Agropecuaria Brasileira. 40, 7 (Jul. 2005), 667–672. DOI:https://doi.org/10.1590/S1678-3921.pab2005.v40.7010.