1) Hudson, R.Y.: Laboratory investigation of rubble mound breakwaters. Proc. of the Amer. Soc. of Civil Eng. Journal of the Waterways and Harbours Division, Vol.85, No.WW 3, Sept. 1959.
2) Thomsen, A. L., P.E.Wohnt and A. S.Harrison: Rip-Rap stability on earth enbankment tested in large and small scale wave tanks. CERC Technical Memorandum No.37, June 1972.
3) Tørum, A., B.Mathiesen and R. Escutia: Scale and model effects in breakwater model tests. P. O. A. C., 1335pp., 1979.
4) Sorensen, T. and o.J.Jensen: Reliability of hydraulic models of rubble-mound breakwater as proven by prototype measurements. The Dock & Harbour Authority, Vol.LXV, No.768, 155 pp., March 1985.