1. An Introduction to Fluid Dynamics;Batchelor,1967
2. Bohlin, T., 1960. On the drag on the a rigid sphere moving in a viscous liquid inside a cylindrical tube. Transactions of the Royal Institute of Technology (Stockholm) 155, 64.
3. Slow viscous flow past a sphere in a cylindrical tube;Brenner;Journal of Fluid Mechanics,1958
4. The motion of a closely-fitting sphere in a fluid-filled tube;Bungay;International Journal of Multiphase Flow,1973
5. The motion of a sphere down a liquid-filled tube;Chester;Proceedings of the Royal Society (London),1984