@misc{ponce_reduction_of_2003, 
author={Ponce, M.L.,Prado, L.,Ruffmann, B.,Richau, K.,Mohr, R.,Pereira Nunes, S.},
title={Reduction of Methanol Permeability in Polyetherketone-Heteropolyacid Membranes},
year={2003},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Ponce, M.; Prado, L.; Ruffmann, B.; Richau, K.; Mohr, R.; Pereira Nunes, S.: Reduction of Methanol Permeability in Polyetherketone-Heteropolyacid Membranes. Journal of Membrane Science. 2003. vol. 217, 5-15.}}