1. Haustein, P.E., Special Editor: Atomic Data and Nuclear Data Tables39, No 2 (1988)
2. Comay, E., Kelson, I., Zidon, A.: ibid, p. 235.
3. Jänecke, J., Massen, P.J.: ibid, p. 265.
4. Masson, P.J., Jänecke, J.: ibid, p. 273.
5. Pape, A., Antony, M.S.: ibid, p. 201.