@misc{warrach_modelling_the_1998, 
author={Warrach, K.},
title={Modelling the thermal stratification in the North Sea},
year={1998},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Warrach, K.: Modelling the thermal stratification in the North Sea. Journal of Marine Systems. 1998. vol. 14, 151-165.}}