1. Amaldi, E.: loc. cit., especially § 71–80
2. Davison, B.: Neutron Transport Theory, Oxford: Clarendon Press, 1957, especially Part IV: Slowing-Down Problems.
3. Goldstein, H.: Fundamental Aspects of Reactor Shielding; Reading: Addison-Wesley, 1959, especially Chapter 6: Calculations of Fast Neutron Penetration.
4. Marshak, R. E.: The Slowing Down of Neutrons, Rev. Mod. Phys. 19, 185 (1947).
5. Sneddon, J. N.: Fourier Transforms, New York-Toronto-London: McGraw-Hill Co., 1951, especially Chapter VI: Slowing Down of Neutrons in Matter.