1. Part 11 in the series: Electronic Structure of Organometallic Compounds. Part 10 see ret. 2. Part of dissertation by M. C. B�hm, T. H. Darmstadt 1980
2. B�hm, M. C., Gleiter, R.: J. Comput. Chem. in press (1980)
3. Fenske, R.: Prog. Inorg. Chem.21, 189 (1976)
4. Lloyd, D. R., Lynaugh, N. in: Electron spectroscopy, Shirley, D. E., Ed. Amsterdam: North Holland 1972
5. Rohmer, M.-M., Veillard, A.: Chem. Commun.250 (1973);