@misc{schwenke_current_work_1990, 
author={Schwenke, H.,Knoth, J.,Weisbrod, U.},
title={Current work on total reflection X-ray fluorescence spectrometry at the GKSS Research Centre},
year={1990},
howpublished = {conference lecture: Antwerp (B); June 20-22, 1990},
note = {Online available at: \url{} (DOI). Schwenke, H.; Knoth, J.; Weisbrod, U.: Current work on total reflection X-ray fluorescence spectrometry at the GKSS Research Centre. European EDXRF Workshop. Antwerp (B), 1990.}}