1. Graf WH. Hydraulics of sediment transport. McGraw-Hill Press, 1971; New York.
2. Rouse H. Fluid mechanics for hydraulic engineers. Dover, 1906; New York.
3. Corey A. Influence of the shape on the fall velocity of sand grains. Master’s thesis, Colorado A&M College, Fort Collins, 1949; Colorado.
4. Fair GM, Geyer JC, Okun DA. Water and wastewater engineering. John Wiley and Sons, 1966; New York.
5. Zanke U. Berechnung der sinkgeschwindigkeiten von sedimenten. Mitt. Des Franzius-Instituts fuer Wasserbau, Heft 46, Seite 243, Technical University, Hannover, 1977; Germany.
6. Yalin MS. The mechanics of sediment transport, second edition.. Pergamon Press, 1977; Oxford.
7. Hallermeier RJ. Terminal settling velocity of commonly occurring sand grains. J Sedimentology 1981; 28(6): 859–865.
8. Dietrich WE. Settling velocity of natural particles. Water Resour Res 1982; 18(6): 1615–1626.
9. Khan AR, Richardson JF. The resistance to motion of a solid sphere in a fluid. J Chem Eng Commun 1987; 62: 135–150.
10. Turton R, Clark N. An explicit relationship to predict spherical particle terminal velocity. Powder Technol 1987; 53(2): 127–129.
11. Van Rijn LC. Handbook: Sediment transport by currents and waves. Report Number H 461, Delft Hydraulics, Delft, 1989; the Netherlands.
12. Ibad-zadeh YA. Movement of sediment in open channels. S. P. Ghosh, translator, Russian translations series, 49, A. A. Balkema, Rotterdam, 1992; The Netherlands.
13.Julien Y P. Erosion and sedimentation. Cambridge University Press, Cambridge, U.K, 2nd edition, 1995; p 271.
14. Cheng NS. A Simplified Settling Velocity Formula for Sediment Particle. J Hydraul Eng 1997; 123(2): 149–152.
15. Ahrens JP. A fall velocity equation. J Waterway Port Coastal J Ocean Eng 2000; 126(2): 99–102.
16. Ahrens JP. Simple equations to calculate fall velocity and sediment scale parameter. J Waterway Port Coastal Ocean Eng 2003; 129(3): 146–150.
17. Jimenez JA, Madsen OS. A simple formula to estimate settling velocity of natural sediments. J Waterway Port Coastal J Ocean Eng 2003; 129(2): 70-78.
18. Brown PP, Lawler DF. Sphere drag and settling velocity revisited. J Environ Eng 2003; 129(3): 222-231.
19. Ferguson RI, Church M. A simple universal equation for grain settling velocity. J Sediment Res 2004; 74(6): 933-937.
20. She K, Trim L, Pope D. Fall velocities of natural sediment particles: a simple mathematical presentation of the fall velocity law. J Hydraul Res 2005; 43(2): 189– 195.
21 Camenen B. Simple and general formula for the settling velocity of particles. J Hydraul Eng 2007; 133(2): 229-233.
22. Sadat-Helbar SM, Amiri-Tokaldany E. Recent advances in water resources, hydraulics & hydrology. Proc. of the 4^{th} IASME / WSEAS International Conference on Water Resources, Hydraulics and Hydrology (WHH'09), 2009; Cambridge.
23. Wu W, Wang SSY. Formulas for sediment porosity and settling velocity. J Hydraul Eng 2006; 132(8): 858-862.
24. Monadi M, Tghizadeh H, Mohammadi M. Calculation of fall velocity of sediment particles. Proc. of the 15^{th} Hydraulic Conference, 14-15 December, 2016; Qazvin, Iran. [In Persian]
25. Chang HK, Liou JC. Discussion of a free-velocity equation, by John P. Ahrens. J Waterway Port Coastal Ocean Engineering 2001; 127(4): 250–251.
26. Rubey W. Settling velocities of gravel, sand and silt particles. Am J Sci 1933; 225: 325–338.
27. Soulsby RL, Dynamics of marine sands. 1997; Thomas Telford, London.