@misc{schwenke_depth_profiling_1994, 
author={Schwenke, H.,Knoth, J.},
title={Depth profiling in surfaces using TXRF},
year={1994},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Schwenke, H.; Knoth, J.: Depth profiling in surfaces using TXRF. Advances in X-Ray Chemical Analysis (Japan). 1994. vol. 261, 137-144.}}