1. Hines, D.A. (1978): Dechema Monographien 82, 55
2. Hines, D.A., Bailey, M., Ousby, J.C., Roesler, F.C. (1975): Int. Chem. Eng. Symp. Ser. No. 41, D1
3. Kiese, S. (1982): Doctor's thesis, Universit�t Dortmund
4. Leistner, G., M�ller, G., Sell, G., Bauer, A. (1979): Chem. Ing. Tech. 51, 588
5. Onken, U., Weiland, P. (1983): Adv. Biotechnol. Proc. 1, 67