@misc{koopmann_multielement_determination_1992, 
author={Koopmann, C.,Diercks, S.,Prange, A.},
title={Multielement determination in wadden sea sediments},
year={1992},
howpublished = {conference lecture: Geesthacht (D); 12.-15.05.1992},
note = {Online available at: \url{} (DOI). Koopmann, C.; Diercks, S.; Prange, A.: Multielement determination in wadden sea sediments. The 4th Workshop on Total-Reflection X-Ray Fluorescence Spectrometry; Book of Abstracts. Geesthacht (D), 1992.}}