@misc{wilken_hg_contamination_1990, 
author={Wilken, R.-D.,Hintelmann, H.,Ebinghaus, R.},
title={Hg contamination and transformation in the Elbe river},
year={1990},
howpublished = {conference lecture: Uppsala (S); June 11-13, 1990},
note = {Online available at: \url{} (DOI). Wilken, R.; Hintelmann, H.; Ebinghaus, R.: Hg contamination and transformation in the Elbe river. International Conference on Mercury as an Environmental Pollutant. Uppsala (S), 1990.}}