1. N. Saito, T. Kiba, K. Kimura, Proc. 2nd Intern. Conf. Peaceful Uses Atomic Energy, United Nations, Genf 1958, Bd. 20, S. 198.
2. K. E. Seyb, G. Herrmann,Z. Elektrochem., 64 (1960) 1065.
3. K. E. Seyb, Dissertation, Mainz, 1961.
4. L. Wish,Anal. Chem., 31 (1959) 326.
5. L. Wish, E. C. Freiling, US Naval Radiolog. Defense Labor. San Francisco, Report USNRDL-464, 1960.