@misc{paul_trennmedium_polymermembranen_1991, 
author={Paul, D.,Schwarz, H.-H.},
title={Trennmedium Polymermembranen},
year={1991},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Paul, D.; Schwarz, H.: Trennmedium Polymermembranen. Spektrum (Deutsche Akademie der Wissenschaften). 1991. vol. 22, no. 6, 30-31.}}