@misc{langenberg_natural_variability_1997, 
author={Langenberg, H.,Pfizenmayer, A.,Storch, H.v.,Suendermann, J.},
title={Natural variability and anthropogenic change of storm related sea level variations along the North Sea coast},
year={1997},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Langenberg, H.; Pfizenmayer, A.; Storch, H.; Suendermann, J.: Natural variability and anthropogenic change of storm related sea level variations along the North Sea coast. GKSS 97-E-48. 1997.}}