@misc{schwarz_membranes_from_1993, 
author={Schwarz, H.-H.},
title={Membranes from water soluble polyelectrolytes: preparation and properties},
year={1993},
howpublished = {conference lecture: Heidelberg (D); 30. August-3. September 1993},
note = {Online available at: \url{} (DOI). Schwarz, H.: Membranes from water soluble polyelectrolytes: preparation and properties. The 1993 International Congress on Membranes and Membrane Processes. Heidelberg (D), 1993.}}