@misc{prange_optimization_of_1999, 
author={Prange, A., Reus, U., Schwenke, H., Knoth, J.},
title={Optimization of TXRF measurements by variable incident angles},
year={1999},
howpublished = {journal article},
note = {Prange, A.; Reus, U.; Schwenke, H.; Knoth, J.: Optimization of TXRF measurements by variable incident angles. Spectrochimica Acta  B. 1999. vol. 54, 1505-1511.}}