1. 1) Karube, D.: Basic stress-strain relations of unsaturated soil, Proc. 8th Asian Conf. SMFE, Vol. 13, pp. 49-52, 1987.
2. 2) Karube, D.: New concept of effective stress in unsaturated soil and its proving test, Advanced Triaxial Testing of Soil and Rocks, ASTM STP 977, pp. 539-552, 1988.
3. 3) 軽部大蔵, 勝山潤一, 丹羽尚人: 不飽和土の三軸圧縮状態における降伏関数, 土木学会論文集, 406号, pp. 205-212, 1989.
4. 4) Alonso, E. E., Gens, A. and Hight, D. W.: Special problem soils, General Report, Proc. 9th European Conf. SMFE, Vol. 3, pp. 1087-1146, 1987.
5. 5) Alonso, E. E., Gens, A. and Josa, A.: A constitutive model for partially saturated soils, Geotechnique Vol. 40, No. 3, pp. 405-430, 1990.