1. Eng, H. (1977)Diplom Thesis, Techn. Univ. Braunschweig, Germany.
2. Klein, J, Hackel, U., Schara, P. and Eng, H. (1979)Angew. Makromol. Chemie (in press).
3. Klein, J. and Vorlop, K. D. (1979). (to be published)
4. Klein, J. and Wagner, F. (1978)DECHEMA-Monogr. 82 (1978) 142?164 (Vlg.-Chemie, Weinheim).
5. Klein, J., Wagner, F., Washausen, P. and Eng, H. (1978)1st European Congr. on Biotechnology 25?29 Sept. 1978 Interlaken, Preprints, part 1, Discussion Papers, Topic 2, page 190?193 (DECHEMA).