1. K. Van’t Riet, Ind. Eng. Chem. Process Des. Dev., 18, 357 (1979).
2. M. K. Dawson, Ph. D Thesis, University of Birmingham, UK (1993).
3. M. J. Whitton and A. W. Nienow, The Proc 3rd Int Conf on Bioreactor and Bioprocess Fluid Dynamics, London (1993).
4. M. Cook, J. C. Middleton and J. R. Bush, The Proc 2nd Int Conf on Bioreactor Fluid Dynamics, Cranfield (1988).
5. A. W. Nienow, Trans IChemE, Part A, 74, 417 (1996).