1. Williams, R. R., J. Phys. Colloid Chem., 52, 603 (1948).
2. Claridge, R. F. C., and Maddock, A. G., Trans. Faraday Soc., 57, 1392 (1961).
3. Machado, J. O., Machado, R. M., and Vargas, J. I., in Chemical Effects of Nuclear Transformations, 2, 195 (IAEA, Vienna, 1965).
4. Maddock, A. G., and Mohanty, S. R., Disc. Faraday Soc., 31, 193 (1961).
5. Mohanty, S. R., J. Sci. Indust. Res., 21A, 247 (1962).