@misc{aspelien_the_use_2006, 
author={Aspelien, T.},
title={The Use of Long-Term Observations in Combination with Modeling and Their Effect on the Estimation of the North Sea Storm Surge Climate (Dissertation)},
year={2006},
howpublished = {doctoral thesis,GKSS report},
note = {Online available at: \url{} (DOI). Aspelien, T.: The Use of Long-Term Observations in Combination with Modeling and Their Effect on the Estimation of the North Sea Storm Surge Climate (Dissertation). Universitaet Hamburg, FB Geowissenschaften, 2006.}}