Antunes, J. F. G., Mercante, E., Esquerdo, J. C. D. M., Lamparelli, R. A. de C., & Rocha, J. V. (2012). Soybean crop area estimation through image classification normalized by the error matrix. Pesquisa Agropecuaria Brasileira, 47(9), 1288–1294. https://doi.org/10.1590/S1678-3921.pab2012.v47.11148