@misc{ulbricht_chemical_modification_1993, 
author={Ulbricht, M., Oechel, A., Schulze, H., Lehmann, C., Hicke, H.-G., Tomaschewski, G.},
title={Chemical modification of polyacrylonitrile ultrafiltration membranes for enzyme immobilization},
year={1993},
howpublished = {conference lecture: Heidelberg (D);},
note = {Ulbricht, M.; Oechel, A.; Schulze, H.; Lehmann, C.; Hicke, H.; Tomaschewski, G.: Chemical modification of polyacrylonitrile ultrafiltration membranes for enzyme immobilization. ICOM '93: The 1993 International Congress on Membranes and Membrane Processes. Heidelberg (D), 1993.}}