1. McCabe, W. L., Smith, J. C., and Harriott, P. (1985),Unit Operations of Chemical Engineering, 4th ed., McGraw Hill, New York.
2. Kaster, J. A., Michelsen, D. L., and Velander, W. H. (1990),Appl. Biochem. and Biotechnol. 24/25, 469–484.
3. Sebba, F. (1987),Foams and Biliquid Foams—Aphrons, Wiley, New York, pp. 47–78.
4. Longe, T. A. (1989), Colloidal Gas Aphrons: Generation, Flow Characterization and Application in Soil and Groundwater Decontamination, PhD. dissertation, Virginia Polytechnic Institute and State University.
5. Sebba, F. (1985),Chem. and Ind., Feb.4, 91, 92.