@misc{paul_membranes_and_2001, 
author={Paul, D.},
title={Membranes and Separation Processes - Membranen und Membrantrennverfahren},
year={2001},
howpublished = {lecture: Universitaet Potsdam;},
note = {Paul, D.: Membranes and Separation Processes - Membranen und Membrantrennverfahren. Universitaet Potsdam, 2001.}}