1. ABAQUS/Standard (1994) Users Manual, Vols. I and I I. Hibbitt, Karlsson and Sorensen, Inc., Pawtucket, Rhode Island.
2. Allen, J.R.L. (1970a) The Avalanching of Granular Solids on Dune and Similar Slopes. J. Geol., 78, 326–351.
3. Allen, J.R.L. (1970b) The Angle of Initial Yield of Haphazard Assemblages of Equal Spheres, in Bulk. Geologie en Mijnbouw, 49, 13–22.
4. Allen, J.R.L. (1985) Principles of Physical Sedimentology. George Allen and Unwin, London.
5. Arthur, J.R.F. and Menzies, B.K. (1972) Inherent Anisotropy in Sand. Géotechnique, 22, 115–128.