@misc{fritsch_membrane_reactors_1999, 
author={Fritsch, D.,Theis, J.,Ziegler, S.},
title={Membrane Reactors with Porousand non-porous Polymeric Membranes},
year={1999},
howpublished = {conference paper,conference lecture: Ravello (I); 23.-27.05.1999},
note = {Online available at: \url{} (DOI). Fritsch, D.; Theis, J.; Ziegler, S.: Membrane Reactors with Porousand non-porous Polymeric Membranes. In: Ravello Conference on New Frontiers for Catalytic Membrane Reactors and other Membrane Systems. Ravello (I). 1999. 118-121.}}