@misc{knoth_total_reflection_1992, 
author={Knoth, J.,Schwenke, H.},
title={Total reflection XRF},
year={1992},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Knoth, J.; Schwenke, H.: Total reflection XRF. In: Grieken, R.; Markowicz, A. (Ed.): Handbook on X-ray spectrometry: methods and techniques. New York: Marcel Dekker. 1992. 453-489.}}