@misc{foerstner_metal_pollution_1990, 
author={Foerstner, U.,Schoer, J.,Knauth, H.-D.},
title={Metal pollution in the tidal Elbe river},
year={1990},
howpublished = {journal article,GKSS report},
note = {Online available at: \url{} (DOI). Foerstner, U.; Schoer, J.; Knauth, H.: Metal pollution in the tidal Elbe river. Science of the Total Environment. 1990. vol. 9798, 347-368.}}