@misc{petersen_vertical_distribution_1990, 
author={Petersen, W.,Knauth, H.-D.,Pepelnik, R.,Bendler, I.},
title={Vertical distribution of Chernobyl isotopes and their correlation with heavy metals and organic carbon in sediment cores of the Elbe estuary},
year={1990},
howpublished = {journal article,GKSS report},
note = {Online available at: \url{} (DOI). Petersen, W.; Knauth, H.; Pepelnik, R.; Bendler, I.: Vertical distribution of Chernobyl isotopes and their correlation with heavy metals and organic carbon in sediment cores of the Elbe estuary. Science of the Total Environment. 1990. vol. 9798, 531-547.}}