@misc{ohlrogge_natural_gas_2001, 
author={Ohlrogge, K., Wind, J., Brinkmann, T., Peinemann, K.-V.},
title={Natural Gas Clean-up by means of Membranes},
year={2001},
howpublished = {conference lecture (invited): Barga (I);},
note = {Ohlrogge, K.; Wind, J.; Brinkmann, T.; Peinemann, K.: Natural Gas Clean-up by means of Membranes. Engineering Foundation Conference ' Advanced Membrane Technology '. Barga (I), 2001.}}