1. Berlanger, M., Gobbi, A., Hanappe, F., Lynen, U., Ngô, C., Olmi, A., Sann, H., Stelzer, H., Richel, H., Rivet, M.F.: Z. Physik A291, 133 (1979)
2. Clerc, H.G., Lang, W., Wohlfarth, H., Schrader, H., Schmidt, K.H.: Proc. 4th Symp. on Physics and Chemistry of Fission, Jülich, 1979 (IAEA, Vienna), in press
3. Moretto, L.G., Sventek, J., Mantzouranis, G.: Phys. Rev. Lett.42, No. 9 563 (1979)
4. Brosa, U., Krappe, H.J.: Z. Physik A284, 65 (1978)
5. Nifenecker, N., Blachot, J., Bocquet, J.P., Brissot, B., Crançon, J., Halemlin, C., Mariolopoulos, G., Ristori, C.: Proc. 4th Symp. on Physics and Chemistry of Fission, Jülich, 1979 (IAEA, Vienna), in press