@misc{knoth_total_reflexion_1989, 
author={Knoth, J.,Schwenke, H.,Weisbrod, U.},
title={Total reflexion X-ray fluorescence spectrometry for surface analysis},
year={1989},
howpublished = {journal article,GKSS report},
note = {Online available at: \url{} (DOI). Knoth, J.; Schwenke, H.; Weisbrod, U.: Total reflexion X-ray fluorescence spectrometry for surface analysis. Spectrochimica Acta  B. 1989. vol. 44, no. 5, 477-482.}}