1. L. A. Lerner, A. A. Rusanov, and V. V. Nedler, Zh. Analiticheskoi Khim.,26, 1697 (1971).
2. H. Dunken, G. Mikkeleit, and K. Geller, Zs. Chem.,3, 196 (1963).
3. M. É. Britske, Analysis of Metallurgical Products by Flame Emission Photometry [in Russian], Metallurgiya, Moscow (1969).
4. S. Nukiama and Y. Tanasawa, Trans. Soc. Mech. Eng. Japan,5, 62, 68 (1939).
5. B. V. L'vov, Atomic Absorption Spectral Analysis [in Russian], Nauka, Moscow (1966).