@misc{pereiranunes_membranes_for_2007, 
author={Pereira Nunes, S.},
title={Membranes for energy},
year={2007},
howpublished = {conference lecture: Siofok (H); 02.-06.09.2007},
note = {Online available at: \url{} (DOI). Pereira Nunes, S.: Membranes for energy. PERMEA 2007. Siofok (H), 2007.}}