1. AASHTO (2003). Designation: T 307-99, Standard Method of Test for Determining the Resilient Modulus of Soils and Aggregate Materials.
2. ASTM International (2003). Designation: D 5333-03, Standard Test Method for Measurement of Collapse Potential Soils.
3. ASTM International (2004). Designation: D 3080-04, Standard Test Method for Direct Shear Test of Soils under Consolidated Drained Conditions.
4. ASTM International (2004). Designation: D 2435, Standard Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Loading.
5. ASTM International (2006). Designation: D 2487, Standard Practice for Classification of Soils for Engineering Purpose (Unified Soil Classification System).