@misc{schultz_membranes_for_1996, 
author={Schultz, J., Peinemann, K.-V.},
title={Membranes for separation of higher hydrocarbons from methane},
year={1996},
howpublished = {journal article},
note = {Schultz, J.; Peinemann, K.: Membranes for separation of higher hydrocarbons from methane. Journal of Membrane Science. 1996. vol. 110, 37-45.}}