Baldani, J. I., Blana, R. A. G. and Dobereiner, J. (2014) “Interactions of nitrate-reductase and nitrogenase activities in maize genotypes”, Pesquisa Agropecuaria Brasileira, 14(2), pp. 165–173. doi: 10.1590/S1678-3921.pab1979.v14.16676.