M. G. Zerizghy, P. Le Roux, M. Hensley, and L. D. van Rensburg, “Prediction of soil distribution on two soilscapes in land type Dc17 east of Bloemfontein, South Africa”, S. Afr. J. Sci., vol. 109, no. 11/12, p. 5, Nov. 2013, doi: 10.1590/sajs.2013/20120021.