1. Wichmann, R., Wandrey, C., Bückmann, A. F. & Kula, M.-R Biotechnol. Bioeng., in press.
2. Weissmann, C. et al., this volume.
3. Kula, M.-R., Kroner, K. H., Hustedt, H., Granda, S. & STACH, W., German Patent 26 39 129, US Patent 4,144,130.
4. Kula, M.-R., Kroner, K. H. & Hustedt, H., in “Advances in Bio chemical Engineering” (A. Piechter, ed.). Springer Verlag, in press.
5. Albertsson, P. A. “Partition of Cell Particles and Macromolecules,”2nd Ed., Wiley, New York (1971).