@misc{grabemann_studies_on_1990, 
author={Grabemann, I.,Kuehle, H.,Kunze, B.,Mueller, A.,Neumann, L. J. R.},
title={Studies on the distribution of oxygen and nutrients in the Weser estuary},
year={1990},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Grabemann, I.; Kuehle, H.; Kunze, B.; Mueller, A.; Neumann, L.: Studies on the distribution of oxygen and nutrients in the Weser estuary. In: Michaelis, W. (Ed.): Estuarine water quality management: monitoring, modelling and research - Coastal and estuarine studies. Berlin: Springer. 1990. 341-344.}}