1. ABAQUS user's manual (1994). ABAQUS/Standard Users's Manual Volume 1 Version 5.4 Hibbitt Karlsson and Sorenson Pawtucket R. I.
2. ANSYS ( 1997). ANSYS commands reference—release 5.4 . ANSYS Inc. Canonsburg Pa.
3. Boyce H. R. ( 1980). “A non-liner model for the elastic behaviour of granular material under repeated loading.” Int. Symp. on Soils under Cyclic and Transient Loading . Swansea U.K.
4. Carter J. P. Booker J. R. and Davis E. H. ( 1977). “Finite deformation of an elasto-plastic soil.” Int. J. Numer. and Analytical Methods in Geomech . 1 25–43.
5. Davis E. H. ( 1969). Theories of plasticity: Selected topics in geotechnical engineering I. H. Lee ed. Butterworths London.