@misc{hicke_different_types_1990, 
author={Hicke, H.-G.,Eisold, C.},
title={Different types of polyacrylonitrile membranes for ultrafiltration},
year={1990},
howpublished = {conference lecture: Prag (CZ); September 1990},
note = {Online available at: \url{} (DOI). Hicke, H.; Eisold, C.: Different types of polyacrylonitrile membranes for ultrafiltration. CHISA-Kongress. Prag (CZ), 1990.}}