@misc{schultz_seperation_of_1994, 
author={Schultz, J., Peinemann, K.-V.},
title={Seperation of higher hydrocarbons from methane},
year={1994},
howpublished = {conference lecture: Tuebingen (D);},
note = {Schultz, J.; Peinemann, K.: Seperation of higher hydrocarbons from methane. In: 7th International Symposium on Synthetic Membranes in Science and Industry. Tuebingen (D). 1994. 274-277.}}