1. 1) 日本流体力学会編集: 流体力学シリーズ2, 混相流体の力学, 朝倉書店, pp. 11, 1991年11月.
2. 2) Tam, C. K. W.: The Drag on a Cloud of Spherical Particles in Low Reynolds Number Flow, J. Fluid Mech., Vol. 38, part 3, pp. 537-546, 1969.
3. 3) Rowe, P. N. and Henwood, G. A.: Drag Forces in a Hydraulic Model of a Fluidised Bed--Part I, Trans. Instn. Chem. Engrs., Vol. 39, pp. 43-55, 1961.
4. 4) Rowe, P. N.: Drag Forces in a Hydraulic Model of a Fluidised Bed--Part II, Trans. Instn. Chem. Engrs., Vol. 39, pp. 175-180, 1961.
5. 5) Eichhorn, R. and Small, S.: Experiments on the Lift and Drag of Spheres Suspended in a Poiseuille Flow, J. Fluid Mech., Vol. 20, part 3, pp. 513-527, 1964.