1. Modification of wave height due to bottom friction, percolation and refraction;Bretschneider,1954
2. Lamb, Horace, , Hydrodynamics, 6 Dover Pubs., New York, 1945,
3. Loss of wave energy due to percolation in a permeable sea bottom;Putnam;Trans. Amir. Geophy. Union,1949
4. Laboratory study of wave energy losses by bottom friction and percolation;Savage,1953