Bottcher C, 1979, J. Phys. B: At. Mol. Phys.
Brinkman H C, 1930, Proc. Acad. Sci. Amsterdam, 33, 973
Harel C, 1977, J. Phys. B: At. 1Mol. Phys., 10, 3511, 10.1088/0022-3700/10/17/024
Nutt W L, 1978, J. Phys. B: At. Mol. Phys., 11, L181, 10.1088/0022-3700/11/6/005
Nutt W L, 1979, J. Phys. B: At. Mol. Phys., 12, L157, 10.1088/0022-3700/12/5/005
Olson R E, 1978, J. Phys. B: At. Mol. Phys., 11, 699, 10.1088/0022-3700/11/4/022
Shah M B, 1974, J. Phys. B: At. Mol. Phys., 7, 630, 10.1088/0022-3700/7/5/014
Shah M B, 1976, J. Phys. B: At. Mol. Phys., 9, 1933, 10.1088/0022-3700/9/11/019
Shah M B, 1978, J. Phys. B: At. Mol. Phys., 11, 121, 10.1088/0022-3700/11/1/016
Shah M B, 1977, J. Phys. B: At. Mol. Phys., 10, L723, 10.1088/0022-3700/10/18/009
Shah M B, 1978, J. Phys. B: At. Mol. Phys., 11, L233, 10.1088/0022-3700/11/7/008
Vaaben J, 1977, J. Phys. B: At. Mol. Phys., 10, L521, 10.1088/0022-3700/10/14/005
Wittkower A B, 1966, Proc. Phys. Soc., 89, 541, 10.1088/0370-1328/89/3/310