1. Opere di insieme da consultare sull’argomento:G. Goodman (editor):The science and Engineering of Nuclear Power. 2 voll. (1947–49) (Cambridge-Mass.).M. Soodak andE. C. Campbell:Elementary Pile Theory (New York, 1950).W. E. Stephens (editor):Nuclear Fission and Atomic Energy (Lancaster, Pa., 1948) e il classico rapporto ufficiale americano:H. D. W. Smyth:Atomic Energy for Military Purposes (Princeton, 1945).
2. E. Fermi:Science, 11, 27 (1947).
3. E. P. Wigner andF. Seitz:Phys. Rev., 43, 804 (1933);46, 509 (1934).F. Seitz:The Modern Theory of Solids (New York, 1940), capp. IX, X.
4. R. E. Marshak:Rev. Mod. Phys. 19, 185 (1947).
5. C. Salvetti:Nuovo Cimento, 6, 303, 413 (1949).