[1] H. Fricke, “The electric conductivity and capacity of disperse systems”, Physics, Vol. 1, 1931, pp.106–115.
[2] M.R.J. Wyllie, and A. R. Gregory, “Formation factors of unconsolidated porous media: Influence of particle shape and effect of cementation”, Journal of Petroleum Technology, Vol. 5, 1953, pp.103–109.
[3] R.E. Meredith, and C. W. Tobias, “Conduction in heterogeneous systems”, Adv. Electrochem. Electrochem. Eng., Vol. 2, 1962, pp.15–47.
[4] R.W. Zimmerman, “Effective conductivity of a two-dimensional medium containing elliptical inhomogeneities”, Proc. R. Soc. London, Ser. A, Vol. 47, 1996, pp.1713–1727.
[5] D. Coelho, J. F. Thovert, and P. M. Adler, “Geometrical and transport properties of random packings of spheres and aspherical particles”, Phys. Rev. E., Vol. 55, 1997, pp.1959–1978.
[6] K. Shinohara, M. Oida, B. Golman, “Effect of particle shape on angle of internal friction by triaxial compression test”, Powder Technology, Vol. 107, No. 1-2, 2000, pp.131–136.
[7] J. Dodds, “Particle Shape and Stiffness-Effects on Soil Behavior”, Atlanta, Ga, USA: Institute of Technology, 2003, pp.121–122.
[8] Q-B.mLiu, W. Xiang, M. Budhu, D-S. Cui, “Study of particle shape quantification and effect on mechanical property of sand”, Rock and Soil Mechanics, Vol. 32, No. 1, 2011, pp.190–197.
[9] K. Johanson, “Effect of particle shape on unconfined yield strength”, Powder Technology, Vol. 194, No. 3, 2009, pp. 246-251.
[10] C. Tuitza, U. Exnera, M. Frehnera, B. Grasemanna, “The impact of ellipsoidal particle shape on pebble breakage in gravel”, International Journal of Rock Mechanics and Mining Sciences, Vol. 54, 2012, pp. 70-79.
[11] R. Barbosa, and J. Ghaboussi, “Discrete finite element method”, Engineering Computations, Vol. 9, 1992, pp. 253-266.
[12] A.W. Bishop, “The principle of effective stress”, Teknisk Ukeblad I Samarbeide Med Teknikk, Oslo, Norway, Vol. 106, No. 39, 1959, pp. 859-863.
[13] A.W. Bishop, “The measurement of pore pressure in the triaxial test,” Conf. British Nat. Soc. Of Int. Soil Mech. and Found. Engrg., Butterworth’s, London., 1961, pp. 38-46.
[14] A.W. Bishop, I. Alpan, G.E. Blight, and I.B. Donald, “Factors controlling the shear strength of partially saturated cohesive soils,” ASCE Conf. Shear Strength of Cohesive Soils, Boulder, CO, 1960, pp. 503-532.
[15] D.G. Fredlund, and H. Rahardjo, “Soil Mechanics for Unsaturated Soils”, Wiley Inter Science, 1993.
[16] X. Lin, and T.T. NG, “A three-dimensional discrete element model using arrays of ellipsoids”, Geotechnique, Vol. 47, No. 2, 1997, pp. 319-329.
[17] N. Lu, and W. J. Likos, “Unsaturated Soil Mechanics”, John Wiley & Sons, 2004.
[18] H.G. Matuttis, S. Luding, and H.J. Herrmann, “Discrete element simulations of dense packings and heaps made of spherical and non-spherical particles”, Powder Technology, Vol. 109, No. 1, 2000, pp. 278-292.
[19] M. Sallam, Amr, “Studies on Modeling Angular Soil Particles Using the Discrete Element Method”, Ph.D. Dissertation, University of South Florida, United State of America, 2004, pp. 182-185.
[20] J. Ting, M. Khawaja, L. Meachum, and J. Rowell, “An ellipse-based discrete element model for granular materials”, International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 17, 1993, pp. 603-623.
[21] J. Ting, L. Meachum, and J. Rowell, “Effect of particle shape on the strength and deformation mechanisms of ellipse-shaped granular assemblages”, Engineering Computations, Vol. 12, 1995, pp. 99-108.