@misc{mueller_lower_weser_1990, 
author={Mueller, A.,Grodd, M.,Weigel, P.},
title={Lower Weser monitoring and modelling},
year={1990},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Mueller, A.; Grodd, M.; Weigel, P.: Lower Weser monitoring and modelling. In: Michaelis, W. (Ed.): Estuarine water quality management: monitoring, modelling and research - Coastal and estuarine studies. Berlin: Springer. 1990. 285-294.}}