%0 journal article %@ 0034-6748 %A Guenther, R., Wiener, G., Knoth, J., Schwenke, H., Bormann, R. %D 1996 %J Review of Scientific Instruments %N 6 %P 2332-2336 %T Determination of concentration depth profiles using total-reflection X-ray fluorescence spectrometry in combination with ion-beam etching %U 6 %X