1. R. Cliff, J. R. Grace, and M. E. Weber(1978 ) Bubbles, Drops and Particles . Academic Press, New York. 380 pp.
2. R. A. Dalrymple, and W. W. Thompson(1976 ) Study of equilibrium beach profiles , Proc. 15th Coastal Eng. Conf.pp.1277 -1296 . Honolulu, Hawaii.
3. R. G. Dean(1973 ) Heuristic models of sand transport in the surf zone , Proc. Conf. Eng. Dynamics in the Surf Zone, pp.208 -214 . Sydney, Australia.