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2. 2) The Society of Powder Technology, Japan (ed.) : "Funtai Shimyurêshon Nyuumon (in Japanese)", pp. 29-82, Sangyo Tosho (1998)
3. 3) Tsuji, T., K. Yabumoto and T. Tanaka : "Spontaneous structures in three-dimensional bubbling gas-fluidized bed by parallel DEM-CFD coupling simulation", Powder Technol., 184, 132-140 (2008)
4. 4) Israelachvili, J. N. : "Intermolecular and Surface Forces, 2nd ed.", Academic Press (1992) ; the Japanese translation, Asakura Shoten (1996)
5. 5) Imai, I. : "Fluid Dynamics I. (in Japanese)", pp. 312-320, Shôkabô (1984)