1. On the behavior of pore pressure during the shear of saturated clay;Akai;Trans, of JSCE,1962
2. A constitutive equation for soils based on viscoplasticity;Akai,1972
3. A stress-strain-time relation of saturated clays;Akai;Trans, of JSCE,1974
4. Existence of a unique stress-strain-time relation for clays;Akai;under contributing to Soils and Foundations,1974
5. On dynamic yield surface of soil material;Adachi,1973