1. Templin, L. J. (ed.) : Reactor Physics Constants, ANL-5800, Second Edition (1963) ; especially Section 3.3: Thermal-Group Diffusion Parameters.
2. Corngold, N. (ed.) : Proceedings of the Brookhaven Conference on Neutron Thermalization, BNL-719 (1962) ; especially Volume III : Experimental Aspects of Transient and Asymptotic Phenomena.
3. Ballowe, W. C.: BNL-719, 799 (1962).
4. Barkov, L., V. K. Makarin, and K. N. Mukhin : J. Nucl. Energy 4, 94 (1957).
5. Beckurts, K. H., and O. KlÜber: Z. Naturforschung 13a, 822 (1958).