1. ASTM Standard D 3080–04. Standard Test Method for Direct Shear Test Under Consolidated Drained Condition, ASTM International.
2. Standard Test Method for Particle-Size Analysis for Soils;ASTM D 422–63,2007
3. ASTM D Standard D 4318–10. Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM International.
4. Influence of weathering on physical and mechanical properties of mudstone;Bhattarai;Disaster Mitigation Debris Flows Slope Failures Landslides,2007
5. New ring shear apparatus and its application to the measurement of residual strength;Bishop;Geotechnique,1971