1. G.J. Stiegel, Liquid transportation fuels from coal. Part 2. Indirect liquefaction, PETC Review, PETC Office of Fossil Energy, US DOE, Issue 4, Fall, 1991.
2. R.D. Srivastava, V.U.S. Rao, G. Cinquegrane, G.J. Stiegel, Catalysts for Fischer–Tropsch, Hydrocarbon Processing, February 1990, pp. 59–68.
3. P.A. Ramachandran, R.V. Chaudhari, Three-Phase Catalytic Reactors, Gordon and Breach, New York, 1983.
4. W.D. Deckwer, Bubble Column Reactors, Wiley, New York, 1992.
5. L.-S. Fan, Gas–Liquid–Solid Fluidization Engineering, Butterworths, Boston, MA, 1989.