1. On the study of pile driving formula based on blow counts;Ali;Geotechnical and Geological Engineering,2011
2. ASAE standard soil cone penetrometer;ASAE,1998
3. Penetrometer techniques in relation to soil compaction and root growth;Bengough,2001
4. Modelling soil attribute depth functions with equal-area quadratic smoothing splines;Bishop;Geoderma,1999
5. Comparison of a dynamic and static penetrometer for reproducibility of readings;Brevik,2006