@misc{brinkmann_separation_of_2011, 
author={Brinkmann, T.,Hoting, B.,Wind, J.,Wolff, T.},
title={Separation of CO2 from Biogas by Gas Permeation},
year={2011},
howpublished = {conference paper: Aachen (D); 27.-28.10.2010},
note = {Online available at: \url{} (DOI). Brinkmann, T.; Hoting, B.; Wind, J.; Wolff, T.: Separation of CO2 from Biogas by Gas Permeation. In: Proceedings of the 13th Aachener Membran Kolloquium. Aachen (D). VIVTA Verein zur Foerderung des Instituts fuer Verfahrenstechnik der RWTH. 2011. 135-142.}}