1. T. A. Green, H. H. Michels, J. C. Browne, and M. M. Madsen, J. Chem. Phys. 61, 5186 (1974). Designated in the text as I.JCPSA60021-9606
2. T. A. Green, J. C. Browne, H. H. Michels, and M. M. Madsen, J. Chem. Phys. 61, 5198 (1974). Designated in the text as II.JCPSA60021-9606
3. H. H. Michels, J. Chem. Phys. 44, 3834 (1966).JCPSA60021-9606
4. C. Bottcher, J. Phys. B 6, 2368 (1973) and unpublished tables.JPAMA40022-3700
5. Y. N. Demkov, Soviet Phys. JETP 18, 138 (1964). SPHJAR0038-5646