6FREDLUND D G, RAHARDJO H. Soil mechanics for unsaturated soils[M]. New York: John Wiley and Sons Inc,1993.
7CHEN R. Laboratory study and constitutive modeling of an unsaturated expansive soil[D]. Hong Kong: The Hong Kong University of Science and Technology.
8DINEEN K, BURLAND J B. A new approach to osmotically controlled oedometer testing[C]// Proc the 1st Int Conf on Unsaturated Soils. Paris, 1995, 2:459 - 465.
9TARANTINO A, MONGIOVI L. Experimental investigations on the stress variables governing unsaturated soil behaviour at medium to high degrees[C]//Proc Experimental Evidence and Theoretical Approaches in Unsaturated Soils.Italy, 2000.
10BOCKING K A, FREDLUND D G. Limitations of the axis translation technique[C]//Proc 4th International Conference on Expansive Soils. Denver, 1980:117 - 135.
