• Bansal, N. P., and R. H. Doremus, Handbook of glass properties, Academic Press Inc., Orlando, 1986.
  • Chau, K. T., R. H. C. Wong, and J. J. Wu, Coefficient of restitution and rotational motions of rockfall impacts, Int. J. Rock Mech. Min. Sci., 39, 6977, 2002.
  • Chau, K. T., R. H. C. Wong, J. Liu, J. J. Wu, and C. F. Lee, Shape effects on the coefficient of restitution during rockfall impacts, Proc. Ninth Int. Cong. Rock Mech., Paris, 541544, 1999.
  • Den Hartog, J. P., Mechanics, Dover Publications, New York, 1961.
  • Dobran, F., Volcanic processes: Mechanisms in material transport, Kluwer Academic/Plenum Publishers, New York, 2001.
  • Fan, L. S., and C. Zhu, Principles of gas-solid flows, Cambridge Univ. Press, Cambridge, 1998.
  • Goldschmidt, M. J. V., J. A. M. Kuipers, and W. P. M. van Swaaij, Hydrodynamic modelling of dense gas-fluidised beds using the kinetic theory of granular flow: Effect of coefficient of restitution on bed dynamics, Chem. Eng. Sci., 56, 571578, 2001.
  • Goldsmith, W., Impact: The theory and physical behaviour of colliding solids, Dover Publications, New York, 2001.
  • Goldsmith, W., The coefficient of restitution, Bull. Mech. Div. Am. Soc. Eng. Educ., 2, 1013, 1952.
  • Iverson, R. M., The physics of debris flows, Rev. Geophys., 35, 245296, 1997.
  • James, M. R., J. S. Gilbert, and S. J. Lane, Experimental investigation of volcanic particle aggregation in the absence of a liquid phase, J. Geophys. Res., 107(B9), 2191, doi:10.1029/2001JB000950, 2002.
  • Pochettino, A., Su le proprietà dei corpi plastici, Nuovo Cimento, 8, 77108, 1914.
  • Sondergaard, R., K. Chaney, and C. E. Brennen, Measurements of solid spheres bouncing off flat plates, ASME J. Appl. Mech., 57, 694699, 1990.
  • Sparks, R. S. J., M. I. Bursik, S. N. Carey, J. S. Gilbert, L. S. Glaze, H. Sigurdsson, and A. W. Woods, Volcanic Plumes, John Wiley and Sons, Chichester, 1997.
  • Stronge, W. J., Friction in collisions: Resolution of a paradox, J. Appl. Phys., 69, 610612, 1991.
  • Wong, R. H. C., K. W. Ho, and K. T. Chau, Shape and mechanical properties of slope material effects on the coefficient of restitution of rockfall study, Proc. Fourth North Am. Rock Mech. Symp., Seattle, 507514, 2000.