L. M. da S. Dias, R. M. Coelho, G. S. Valladares, A. C. C. de Assis, E. P. Ferreira, and R. C. da Silva, “Soil class prediction by data mining in an area of the sedimentary São Francisco basin”, PAB, vol. 51, no. 9, pp. 1396–1404, Oct. 2016.