1. Cf. Sangster, R. C., and Irvine, J. W., J. Chem. Phys., 24, 670 (1956). Brown, F., Furst, M., and Kallmann, H., Trans. Farad. Soc., 27, 43 (1959).
2. Magat, M., Bouby, L., Chapiro, A., and Gislon, N., Z. Elektrochem., 62, 307 (1958).
3. Furst, M., and Kallmann, H., J. Chem. Phys., 23, 607 (1955). Furst, M., Kallmann, H., and Brown, F., in Semiconductors and Phosphors, 269 (Interscience Pub., New York, 1958).