1. Kittel, J. H., Argonne National Laboratory Report ANL-5731 (November 1957).
2. Leipunskii, A. I., et al., Proceedings of the 3rd International Conference on the Peaceful Uses of Atomic Energy, Geneva, Paper P/312, UN (1964).
3. Brief communication
4. Symposium on the Dounreay Fast Reactor, 7th Dec. 1960, Institute of Mechanical Engineers, and British Nuclear Energy Conference, London.