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2. Assessment of the instability hazard of a granite boulder;Alejano;Natural Hazards,2010
3. ASTM D2487-06e1. Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System);American Society for Testing Materials,2006
4. ASTM D2573-08. Standard Test Method for Field Vane Shear Test in Cohesive;American Society for Testing Materials,2008
5. ASTM WK27337. New Test Method for Pocket Penetrometer Test (under development);American Society for Testing Materials,2010