1. Hahn O. et al.: Naturwissenschaften27 (1937), 11.
2. Vandenbosch Huizenga J. R.: Nuclear Fission, Academic Press, N. Y., 1973, p. 379.
3. Pauli H. C. et al.: Proc. of the Third IAEA Symp. on Phys. Chem. of Fission, Rochester, N. Y., 1973; IAEA, Vienna, 1973, p. 463.
4. Carles C. et al.: Proc. of the IAEA Symp. on Phys. and Chem. of Fission, Vienna, 1973, p. 119.
5. Bowmann H. R. et al.: Phys. Rev.129 (1963) 2133.