1. A. Weissberger and others. Organic Solvents [Russian translation], Moscow, IL, 1958.
2. M. O. Korshun and N. E. Gel'man, New Methods of Elemental Microanalysis [in Russian], Moscow, Goskhimizdat, 1949.
3. A. I. Brodskii, Isotope Chemistry [in Russian], Moscow, Izd. AN SSSR, 1957.
4. J. B. M. Herbert and S. Lauder, Trans. Farad. Soc., 61, 2580, 1939.
5. O. Reitz, Z. Elektrochem., 44, 693, 1938; Z. phys. Chem. A183, 371, 1939.