@misc{kruse_newsletter_free_2004, 
author={Kruse, J.,Kanzow, J.,Raetzke, K.,Faupel, F.,Heuchel, M.,Frahn, J.,Hofmann, D.},
title={Newsletter: Free Volume in Polymeric Membranes: Experiment and Simulation},
year={2004},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Kruse, J.; Kanzow, J.; Raetzke, K.; Faupel, F.; Heuchel, M.; Frahn, J.; Hofmann, D.: Newsletter: Free Volume in Polymeric Membranes: Experiment and Simulation. Membrane News. 2004. vol. 66, 51-54.}}