1. Anderson, M. G. & Pope, R. G. 1984. The incorporation of soil water physics models into geotechnical studies of landslide behaviour. Proceedings of the 4th International Symposium on Landslides, 4, 349–353.
2. Brand, E. W., Premchitt, J. & Phillipson, H. B. 1984. Relationship between rainfall and landslides in Hong Kong. Proceedings of the 4th International Symposium on Landslides, 1, 377–384.
3. Shear strength of unsaturated soils.;Canadian Geotechnical Journal,,1978
4. Fredlund, D. & Rahardjo, H. 1993. Soil Mechanics for Unsaturated Soils. Wiley, New York.
5. Gan, J. K. M. & Fredlund, D. G. 1996. Direct Shear and Triaxial Testing of a Hong Kong Soil under Saturated and Unsaturated Conditions. GEO Report No. 46. Geotechnical Engineering Office, Hong Kong Government.