@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);},
note = {Schwenke, H.; Knoth, J.; Weisbrod, U.: Surface analysis using total reflection X-ray fluorescence spectroscopy. Pittsburgh Conference. New York, NY (USA), 1990.}}