1. Berrington, K. A.: 1985, J. Phys. B18, L395.
2. Berrington, K. A., Burke, P. G., Dufton, P. L., and Kingston, A. E.: 1977, J. Phys. B10, 1465.
3. Berrington, K. A., Burke, P. G., Dufton, P. L., and Kingston, A. E.: 1981, Atomic Data and Nuclear Data Tables 26, 1.
4. Berrington, K. A., Burke, P. G., Dufton, P. L., and Kingston, A. E.: 1985, Atomic Data and Nuclear Data Tables (in press).
5. Doschek, G. A., Feldman, U., Van Hoosier, M. E., and Bartoe, J.-D.F.: 1916, Astrophys. J. Suppl. 31, 417.