@misc{paul_membrantrennverfahren__1998, 
author={Paul, D.},
title={Membrantrennverfahren},
year={1998},
howpublished = {lecture: Universitaet Hamburg, FB Chemie; SS 1998},
note = {Online available at: \url{} (DOI). Paul, D.: Membrantrennverfahren. Universitaet Hamburg, FB Chemie, 1998.}}