1. L. Rosenfeld:Spectroscopy and Group Theoretical Methods, edited byC. Bloch et al. (Amsterdam, 1968), p. 203.
2. C. Mahoux andH. A. Weidenmüller:Shell-Model Approach to Nuclear Reactions (Amsterdam, 1969).
3. P. L. Kapur andR. E. Peierls:Proc. Roy. Soc., A166, 277 (1938).
4. A. M. Lane andR. G. Thomas:Rev. Mod. Phys.,30, 257 (1958).
5. J. Humblet: Thesis,Soc. Roy. Sci. Liège (8°),12, No. 4 (1952).