1. ASTM (1999) Standard Test Method for Penetration Test and Split-barrel Sampling in Soils, American Society for Testing and Materials, ASTM, D1586-99.
2. ASTM (2005a) Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, American Society for Testing and Materials, Annual Book of ASTM Standards, ASTM Manual, ASTM, D4318-05.
3. ASTM (2005b) Standard Test Method for Energy Measurement for Dynamic Penetrometers, American Society for Testing and Materials, Annual Book of ASTM Standards, ASTM Manual, ASTM, D4633-05.
4. ASTM (2007) Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils, American Society for Testing and Materials, Annual Book of ASTM Standards, ASTM Manual, ASTM, D2850-03a.
5. ASTM (2008) Standard Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes, American Society for Testing and Materials, Annual of ASTM Standards, ASTM, D1587-08.