1. The Society of Powder Technology, Japan ed., Handbook of powder technology (in Japanese), Nikkan Kogyo, 1998. pp.344-349.
2. Flow of solid particles through orifice;Kuwai;Chem. Eng. Sci. Jpn.,1953
3. Flow of particles through orifices;McDougall;Trans. Inst. Chem. Engrs.,1969
4. Vertical Air-controlled particle flow from a bunker through circular orifices;De Jong;Powder Technology,1969
5. Aerated solids flow through a vertical standpipe below a pneumatically discharged bunker;De Jong;Powder Technology,1975