E. L. Bottega, D. M. de Queiroz, N. T. Santos, F. de A. de C. Pinto, and C. M. A. de Souza, “Correlation between apparent electrical conductivity and chemical and physical attributes of a Rhodic Hapludox”, Com. Sci., vol. 6, no. 2, pp. 134–142, Jul. 2015.