1. M. A. Bredig, in Molten Salt Chemistry, ed. M. Blander (Interscience, New York, 1964) p. 367.
2. N. F. Mott, Metal-Insulator Transitions (Taylor and Francis, London, 1974).
3. M. Cutler, Liquid Semiconductors (Academic Press, New York, 1977).
4. W. W. Warren, Jr. in Advances in Molten Salt Chemistry, Vol. 4, ed. G. Mamantov and J. Braunstein (Plenum, New York, 1981) p. 1.
5. H. Yokokawa, O. J. Kleppa, and N. H. Nachtrieb, J. Chem. Phys. 71, 4099 (1979).