@misc{wilken_measurement_of_1989, 
author={Wilken, R.-D.,Neumann, L. J. R.,Christiansen, H.,Boeddeker, H.},
title={Measurement of heavy metals and calculations of transport rates in the river upstream and downstream of Hamburg harbour},
year={1989},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Wilken, R.; Neumann, L.; Christiansen, H.; Boeddeker, H.: Measurement of heavy metals and calculations of transport rates in the river upstream and downstream of Hamburg harbour. In: Der Hafen: eine oekologische Herausforderung. 1989. 158-161.}}