1. Shroy, R.E., Gaigalas, A.K., Schatz, G., Fossan, D.B.: Phys. Rev. C19, 1324 (1979)
2. Faber, S.R., Young, L.E., Bernthal, F.M.: Phys. Rev. C19, 720 (1979)
3. Konijn, J., Ketel, T.J., Verheul, H.: Z. Phys. A ? Atoms and Nuclei289, 287 (1979)
4. Mahnke, H.-E., Dafni, E., Rafailovich, M.H., Sprouse, G.D., Vapirev, E.: Phys. Rev. C26, 493 (1982)
5. Frauenfelder, H., Steffen, R.M.: In: Alpha-, Beta-, and Gamma-Ray Spectroscopy. Siegbahn, K. (ed.), Vol. II, p. 997ff. Amsterdam: North-Holland 1965;