Nakagawa, J., Machado, J. R. and Rosolem, C. A. (2014) “Effect of plant density on soybean cultivars in two planting dates”, Pesquisa Agropecuaria Brasileira, 23(9), pp. 1003–1014. doi: 10.1590/S1678-3921.pab1988.v23.14025.