@misc{rikowski_preparation_and_1999, 
author={Rikowski, E.,Pereira Nunes, S.,Krueger, R.-P.},
title={Preparation and Characterization of Silsesquioxanes and their use in Membrane Science},
year={1999},
howpublished = {conference lecture: Berlin (D); 14.-19. August 1999},
note = {Online available at: \url{} (DOI). Rikowski, E.; Pereira Nunes, S.; Krueger, R.: Preparation and Characterization of Silsesquioxanes and their use in Membrane Science. 27. Hauptversammlung der Gesellschaft Deutscher Chemiker 1999 in Verbindung mit dem 37th IUPAC Congress. Berlin (D), 1999.}}