@misc{paul_membranes_from_1994, 
author={Paul, D.,Albrecht, W.,Weigel, T.},
title={Membranes from polyacrylonitrile for ultrafiltration},
year={1994},
howpublished = {conference paper,conference lecture: Hangzhou (VRC); 05.-10.04.1994},
note = {Online available at: \url{} (DOI). Paul, D.; Albrecht, W.; Weigel, T.: Membranes from polyacrylonitrile for ultrafiltration. In: Proceedings of the International Symposium of Membranes and Membrane Processes. Hangzhou (VRC). 1994. 54.}}