1. Walton, O. R. , & Braun, R. L. 1986b Viscosity and temperature calculations for shearing assemblies of inelastic, frictional disks.J. Rheol. 30,949–980.
2. Maw, N. , Barber, J. R. & Fawcett, J. N. 1976 The oblique impact of elastic spheres.Wear 38,101–114.
3. Jenkins, J. T. & Richman, M. W. 1985 Grad's 13-moment system for a dense gas of inelastic spheres.Arch. Rat. Mech. Anal. 87,355–377.
4. Hopkins, M. A. , Jenkins, J. T. & Louge, M. Y. 1992 On the structure of 3D shear flows. In Advances in Micromechanics of Granular Materials (ed. H. Shen , M. Satake , M. Mehrabadi , C. S. Chang & C. S. Campbell ).Elsevier.
5. Richman, M. W. 1989 The source of 2nd moment in dilute granular flows of highly inelastic spheres.J. Rheol. 33,1293–1306.