1. Bathurst J. C. (1977). “Resistance to flow in rivers with stony beds ” PhD thesis University of East Anglia Norwich U.K.
2. The hydrodynamics of particle clusters and sediment entrapment in coarse alluvial channels
3. Cheng E. D. H. and Clyde C. G. (1972). “Instantaneous hydrodynamic lift and drag forces on large roughness elements in turbulent open channel flow.” Sedimentation Symp. to Honor Prof. H. A. Einstein H. W. Shen (ed.) Colorado State University Fort Collins Colo. 3.1–3.20.
4. Duncan W. J. Thom A. S. and Young A. D. (1970). Mechanics of fluids 2nd Ed. Edward Arnold London U.K.
5. Free Surface, Velocity Gradient Flow Past Hemisphere