1. G. Ehrlich, J. Phys. Chem. Solids 1, 3 (1956).JPCSAW0022-3697
2. G. Ehrlich, J. Phys. Chem. 60, 1388 (1956).JPCHAX0022-3654
3. Ehrlich, Hickmott, and Hudda, J. Chem. Phys. 28, 506 (1958).JCPSA60021-9606
4. J. C. P. Mignolet, J. Chem. Phys. 21, 1298 (1953).JCPSA60021-9606
5. T. N. Rhodin, Jr., J. Am. Chem. Soc. 72, 5691 (1950).JACSAT0002-7863