1. Lederer, C. M., Hollander, J. M., Perlman, I.: Table of isotopes. New York: John Wiley & Sons 1968.
2. Deutch, B. I., Heestand, G. M.: In: Angular correlations in nuclear disintegration, eds. v. Krugten, H., v. Nooijen, B. Rotterdam: University Press 1971.
3. Toschinski, H.: Diplom Thesis, unpublished.
4. Abragam, A., Pound, R. V.: Phys. Rev.92, 943 (1953).
5. Frauenfelder, H., Steffen, R. M.: In: Alpha-, beta- and gamma-ray spectroscopy, ed. Siegbahn, K. Amsterdam: North-Holland Publishing Co. 1966.