F. de O. Pedrosa, A. J. do Nascimento, R. Alvahydo, and J. Döbereiner, “Leghemoglobin and molybdenum contente in soybean (Glycine max) nodules inoculated with Rhizobium strains of normal and exceptional efficiency”, PAB, vol. 5, no. 1, pp. 373–379, Apr. 2014.