@misc{paul_membranen_fuer_1998, 
author={Paul, D.},
title={Membranen fuer moderne Technologien},
year={1998},
howpublished = {lecture: TU Berlin; 30.01.1998},
note = {Online available at: \url{} (DOI). Paul, D.: Membranen fuer moderne Technologien. TU Berlin, 1998.}}