@misc{schwenke_surface_analysis_1990, 
author={Schwenke, H.,Knoth, J.,Weisbrod, U.},
title={Surface analysis using total reflection X-ray fluorescence spectroscopy},
year={1990},
howpublished = {conference lecture: New York, NY (USA); 05.-09.03.1990},
note = {Online available at: \url{} (DOI). Schwenke, H.; Knoth, J.; Weisbrod, U.: Surface analysis using total reflection X-ray fluorescence spectroscopy. Pittsburgh Conference. New York, NY (USA), 1990.}}