Tourino, M.C.C., de Rezende, P.M. and Salvador, N. (2002) “Row spacing, plant density and intrarow plant spacing uniformity effect on soybean yield and agronomic characteristics”, Pesquisa Agropecuaria Brasileira, 37(8), pp. 1071–1077. doi:10.1590/S1678-3921.pab2002.v37.6440.