1. Pulsed Neutron Research, IAEA, Vienna (1965).
2. B. Davison, Neutron Transport Theory, Clarendon Press, Oxford (1957).
3. E. Pendlebury, Proc. Phys. Soc. A,68, 474 (1955).
4. V. Ya. Pupko, Preprint FEI-103 (1967).
5. E. A. Stumbur et al., At. Énerg.,25, 13 (1968).