@misc{hempel_determination_of_2000, 
author={Hempel, M.,Ebinghaus, R.,Kock, H.H.},
title={Determination of mercury in ambient air using highly time resolved on-line methods},
year={2000},
howpublished = {conference lecture: Ispra (I); 08.-10.05.2000},
note = {Online available at: \url{} (DOI). Hempel, M.; Ebinghaus, R.; Kock, H.: Determination of mercury in ambient air using highly time resolved on-line methods. Workshop on Harmonization of Sampling and Analysis Methods for Heavy Metals. Ispra (I), 2000.}}