@misc{schwedhelm_provenance_of_1988, 
author={Schwedhelm, E.,Salomons, W.,Schoer, J.,Knauth, H.-D.},
title={Provenance of sediments and the suspended matter of the Elbe estuary},
year={1988},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Schwedhelm, E.; Salomons, W.; Schoer, J.; Knauth, H.: Provenance of sediments and the suspended matter of the Elbe estuary. GKSS 88-E-20. 1988.}}