1. Standard Test Method for Mechanical Cone Penetration Tests of Soil;American Society for Testing and Materials D3441,1998
2. Standard Test Method for Electronic Friction Cone and Piezocone Penetration Testing of Soils;American Society for Testing and Materials D5778,2012
3. Design parameters for sands from CPT;Baldi,1982
4. The Piezocone Penetrometer. Symposium on Cone Penetration Testing and Experience;Baligh,1981
5. Short description of a field testing method with a cone shaped sounding apparatus;Barentsen,1936