Pedrosa F de O, Nascimento AJ do, Alvahydo R, Döbereiner J. Leghemoglobin and molybdenum contente in soybean (Glycine max) nodules inoculated with Rhizobium strains of normal and exceptional efficiency. PAB. 2014;5(1):373-379. doi:10.1590/S1678-3921.pab1970.v5.17826