1. Y.T. Sha, Gas–Liquid–Solid Reactor Design, McGraw-Hill, New York, 1979
2. P.A. Ramachandran, R.V. Chaudari, Three-Phase Catalytic Reactors, Gordon and Breach, New York, 1983
3. A. Gianetto, P.L. Silveston, Multiphase Chemical Reactors, Hemisphere, New York, 1986
4. Flow pattern, pressure loss and liquid holdup data in gas-liquid downflow packed beds with foaming and nonfoaming hydrocarbons.
5. Pressure drop and liquid holdup for two phase concurrent flow in packed beds