1. Standard Test Methods for Classification of Soils for Engineering Purposes;ASTM,1992
2. Aung, K.K., 2001. Engineering Characteristics of Residual Soil with Respect to Degree of Weathering. M.Eng. Thesis, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 162 pp.
3. Laboratory Testing. BS: 1377,1990
4. Laboratory Testing. BS: 7591,1992
5. The form and function of microfabric features in a variety of natural soils;Collins;Geotechnique,1974