@misc{bernem_watis__1989, 
author={Bernem, K.-H.van,Krasemann, H.L.,Lisken, A.,Mueller, A.,Patzig, S.,Riethmueller, R.},
title={WATiS – an information system for the German Wadden Sea},
year={1989},
howpublished = {conference lecture: Rome (I); 24.-26.10.1989},
note = {Online available at: \url{} (DOI). Bernem, K.; Krasemann, H.; Lisken, A.; Mueller, A.; Patzig, S.; Riethmueller, R.: WATiS – an information system for the German Wadden Sea. ARC-INFO, The Fourth Annual ESRI European User Conference. Rome (I), 1989.}}