@misc{bellingen_natural_gas_1994, 
author={Bellingen, E.-M.,Peinemann, K.-V.,Behling, R.-D.},
title={Natural gas cleanup: A comparison of new membranes suitable for the removal of CO2 and H2S},
year={1994},
howpublished = {conference lecture: Tuebingen (D); 29. August-1. September 1994},
note = {Online available at: \url{} (DOI). Bellingen, E.; Peinemann, K.; Behling, R.: Natural gas cleanup: A comparison of new membranes suitable for the removal of CO2 and H2S. Synthetic Membranes in Science and Industry. Tuebingen (D), 1994.}}