1. F. Mohler, P. Foote, and R. Chenault, Phys. Rev. 27, 37 (1926).PHRVAO0031-899X
2. E. O. Lawrence and N. Edlefsen, Phys. Rev. 34, 233 (1929).PHRVAO0031-899X
3. F. Mohler and C. Boeckner, J. Res. Natl. Bur. Std. (U.S.) 5, 51, 399 (1930).
4. K. Freudenberg, Z. Physik 67, 417 (1931).ZEPYAA0044-3328
5. Y. Lee and B. H. Mahan, J. Chem. Phys. 42, 2893 (1965); JCPSA60021-9606