Ruschel, A. P. (2014) “Effect of nitrogen sources added to the soil and effect of <i> Rhizobium japonicum</i> inoculation on yield, protein and oil content of two soybean varieties”, Pesquisa Agropecuaria Brasileira, 10(11), pp. 19–23. doi: 10.1590/S1678-3921.pab1975.v10.17100.