@misc{paul_membrane_materials_1999, 
author={Paul, D.},
title={Membrane materials - Membranes in clean production},
year={1999},
howpublished = {conference lecture: Geesthacht (D);},
note = {Paul, D.: Membrane materials - Membranes in clean production. Advanced Course on the Use of Membrane Technolgy in Environmental Application (ACUMETA) - Membrane Technology in the Chemical and Automotive Industry: From Product Recovery to Fuel Cell Technology. Geesthacht (D), 1999.}}