@misc{kaiser_monitoring_of_1989, 
author={Kaiser, M.,Irmer, U.,Weiler, K.},
title={Monitoring of water quality: seasonel variations of heavy metals in sediments, suspended particulate matter and tubificids of the Elbe river},
year={1989},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Kaiser, M.; Irmer, U.; Weiler, K.: Monitoring of water quality: seasonel variations of heavy metals in sediments, suspended particulate matter and tubificids of the Elbe river. Environmental Technology Letters. 1989. vol. 10, 845-854.}}