1. Kaiser, H.: Spectrochim. Acta 2, 1 (1941).
2. Honer, Jäger-Sohn, M., u. H. Kaiser: Spectrochim. Acta 2, 396 (1944).
3. Kaiser, H.: Spectrochim. Acta 3, 159 ( 1947 49 ).
4. Churchill, J. R.: Ind. Eng. Chem., Anal. Ed. 16, 653 (1944).
5. Kaiser, H.: Spectrochim. Acta 4, 351 ( 1950 52 ).