1. Aymar, M., Crance, M., Klapisch, M.: J. Physique31, 141 (1970)
2. Klapisch, M.: Computer Phys. Commun.2, 239 (1971)
3. Moore, C.E.: Atomic Energy Levels, Natl Bur. Std (U.S.) circ. (U.S. Gov't Printing Office, Washington, D.C., 1949)
4. Miller, M.H., Roig, R.A.: Phys. Rev. A8, 480 (1975)
5. Allen, L., Jones, D.G.C., Schofield, D.G.: J. Opt. Soc. Am.59, 842 (1969)