Kongkitkul, W., Tatsuoka, F., Duttine, A., Kawabe, S., Enomoto, T. and Di Benedetto, H. (2008): "Modelling and simulation of rate-dependent stress-strain behaviour of granular materials in shear", Soils and Foundations, 48 (2), 175-194. Tatsuoka, F., Di Benedetto, H., Kongkitkul, W., Kongsukuprasert, L., Nishi, T. and Sano, Y. (2008): "Modelling of aging effects on the elasto-viscoplastic behaviour of geomaterial", Soils and Foundations, 48 (2), 155-174. Tatsuoka, F., Di Benedetto, H., Enomoto, T., Kawabe, S. and Kongkitkul, W. (2008): "Various viscosity types of geomaterials in shear and their mathmatical expression", Soils and Foundations, 48 (1), 41-60. Abdelrahman, G, E., Kawabe, S., Tsukamoto, Y. and Tatsuoka, F. (2008): "Small-strain stress-strain properties of expanded polystyrene geoform", Soils and Foundations, 48 (1), 61-71. Kiyota, T., Sato, T. and Koseki, J. (2008): "Large strain liquefaction tests using modified hollow cylindrical torsional shear apparatus", Bulletin of ERS, No. 40, Institute of Industrial Science, University of Tokyo.