1. Discussion: Water Filtration at Washington D.C;Blatch,1906
2. Transportation of sand and gravel in four inch pipe;Howard;Transaction of ASCE,1939
3. Basic relationship of the transportation of solids in pipes;Durand,1953
4. Hydraulic conveying of solids in horizontal pipes;Newitt;Transactions of the American Institute of Chemical Engineers,1955
5. Particle migration in laminar boundry layer flow;Lee;International Journal of Multiphase Flow,1973