1. Dynamics of particles and pressure drop under pneumatic conveyance;Prem,1967
2. Flow characteristics of solid-gas mixture in a horizontal and vertical conduit;Farber;Ind. Engng Chem. ind. (int.) Edn,1949
3. Pneumatic grain conveying;Segler,1961
4. Pressure drop in the pneumatic conveyance of solids;Pinkus;J. appl. Mech.,1952
5. The pneumatic conveying of spheres through straight pipes;Hitchcock;Br. J. appl. Phys.,1958