1Coulomb C A. Acad. Roy. Sci. Mem. Phys. Divers Savants., 1773, 7: 343
2Faraday M. Philos. Tran. Roy. Soc. London, 1831,52: 299
3Reynolds O. Phil. Mag. Ser.5, 1885,50:469
4Roberts I. Proc. Roy. Soc. 1884, 36: 226; Janssen H A. Z.Vereins Deutsch Ing., 1895,39:1045
5de Gennes P G. Rev. Mod. Phys., 1999, 71:S374
6Kadanoff L P. Rev. Mod. Phys., 1999,71:435
7Duran J. Sand, Powder, and Grains. New York: Springer, 2000;Ristow H. Pattern Formation in Granular Materials. Berlin: Heidelberg, Springer-Verlag, 2000
8Bak P, Tang C, Wiesenfeld K. Phys. Rev. Lett., 1987,59:381
9Jensen H J. Self-Organized Criticality. London: Cambridge University Press, 1998
10Horvath V K, Janosi I M, Vella P J. Phys. Rev. E, 1996,54: 2005