1. A. Weinberg and E. Wigner, The Physical Theory of Neutron Chain Reactors, Univ. Chicago (1958).
2. O. I. Leipunskii, B. V. Novozhilov, and V. N. Sakharov, Propagation of Gamma Rays in Matter [in Russian], Fizmatgiz, Moscow (1960).
3. B. Rossi, High Energy Particles, Prentice-Hall, New York (1952).
4. S. V. Starodubtsev and A. M. Romanov, Penetration of Charged Particles Through Matter [in Russian], Akad. Nauk UzbekSSR, Tashkent (1962).
5. M. N. Nikolaev and N. O. Bazazyants, Anisotropy of Elastic Scattering of Neutrons [in Russian], Atomizdat, Moscow (1972).