Santos, F. L.; Jesus, V. A. M. de; Valente, D. S. M. <b>Modeling of Soil Penetration Resistance Using Statistical Analyses and Artificial Neural networks</b&gt; - Doi: 10.4025/actasciagron.V34i2.11627. Acta Sci. Agron. 2011, 34, 219-224.