@misc{paul_membrane_separation_1999, 
author={Paul, D.},
title={Membrane separation processes for a cleaner production},
year={1999},
howpublished = {conference lecture (invited): Tsukuba (J); 18.03.1999},
note = {Online available at: \url{} (DOI). Paul, D.: Membrane separation processes for a cleaner production. National Institute of Materials and Chemical Research (NIMC). Tsukuba (J), 1999.}}