M. P. Padovan, D. L. de Almeida, J. G. M. Guerra, R. de L. D. Ribeiro, and A. Ndiaye, “Evaluation of soybean cultivars under organic management for green manuring and grain production”, PAB, vol. 37, no. 12, pp. 1705–1710, Dec. 2002, doi: 10.1590/S1678-3921.pab2002.v37.6521.