1. PhD Thesis, Faculty of Civil Engineering;SS Agus,2005
2. Al-Badran YMH, Schanz T (2013) Effect of suction on volumetric yielding behaviour under different initial conditions for fine-grained soils. Engineering & Technology Journal 31(20):339–358
3. Alonso EE, Gens A, Josa A (1990) A constitutive model for partially saturated soils. Geotechnique 40:405–430, DOI: https://doi.org/10.1680/geot.1990.40.3.405
4. ASTM D-5333 (1993) Test method for measurement of collapse potential of soils. ASTM D-5333, ASTM International, West Conshohocken, PA, USA
5. ASTM D-5333 (2003) Test method for measurement of collapse potential of soils. ASTM D-5333, ASTM International, West Conshohocken, PA, USA