1. Handbook of mathematical functions;Abramowitz,1972
2. Motion of waves in shallow water. Interaction between waves and sand bottoms;Bagnold,1946
3. Sand concentration in an oscillatory flow;Bakker,1974
4. Near-bottom velocities in waves with a current;Bakker,1978
5. The increase of bed shear in a current due to wave motion;Bijker,1966