Silveira, J.A.G. da et al. 2014. Nitrogen partitioning and dry matter distribution in three cowpea cultivars. Pesquisa Agropecuaria Brasileira. 24, 9 (Apr. 2014), 1153–1160. DOI:https://doi.org/10.1590/S1678-3921.pab1989.v24.16317.