@misc{richau_polyelectrolyte_complex_1993, 
author={Richau, K.,Schwarz, H.-H.,Paul, D.},
title={Polyelectrolyte complex membranes for enzyme immobilization},
year={1993},
howpublished = {conference lecture: Berlin (D); 5.-10. September 1993},
note = {Online available at: \url{} (DOI). Richau, K.; Schwarz, H.; Paul, D.: Polyelectrolyte complex membranes for enzyme immobilization. 44th Meeting of the International Society of Electrochemistry. Berlin (D), 1993.}}