@misc{onken_an_integrated_2009, 
author={Onken, R.,Riethmueller, R.},
title={An integrated observation system for tidal flat areas},
year={2009},
howpublished = {conference lecture: Liege (B); 04.-08.05.2009},
note = {Online available at: \url{} (DOI). Onken, R.; Riethmueller, R.: An integrated observation system for tidal flat areas. 41st International Liege Colloquium on Ocean Dynamics. Liege (B), 2009.}}