@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);},
note = {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.}}