1. Falb, Biotech. and Bioeng. Suppl. 3, 177 (1972).
2. Weetall and Messing, The Chemistry of Biosurfaces, Volume 2, Marcel Dekker, New York, 563 (1972).
3. Chibata and Testuya, Ann. Rept. Tanake Seiyaku Co., Ltd., Tech. Part, Vol. 16, 59 (1968).
4. Kunii and Levenspiel, Fluidization Engineering, John Wiley and Sons, Inc., New York, 1969. Chapter 1.
5. Zenz and Othmer, Fluidization and Fluid-Particle Systems, Reinhold Publishing Corp., New York, 1960. Chapter 2.