@misc{fritsch_preparation_and_1998, 
author={Fritsch, D.,Ziegler, S.,Theis, J.},
title={Preparation and Test of Inorganic Modified Porous Polymer Membranes in Gas Phase Catalysis},
year={1998},
howpublished = {conference lecture: Kopenhagen (DK); September 8-10, 1998},
note = {Online available at: \url{} (DOI). Fritsch, D.; Ziegler, S.; Theis, J.: Preparation and Test of Inorganic Modified Porous Polymer Membranes in Gas Phase Catalysis. III. International Catalysis in Membrane Reactors. Kopenhagen (DK), 1998.}}