@misc{pfizenmayer_a_possible_2000, 
author={Pfizenmayer, A., Storch, H.v.},
title={A possible indication of  anthropogenic climate change in the wave climate in the central North Sea},
year={2000},
howpublished = {GKSS report},
note = {Pfizenmayer, A.; Storch, H.: A possible indication of  anthropogenic climate change in the wave climate in the central North Sea. GKSS 2000-3. 2000.}}