1. A. S. Kompaneets, Zh. Éksp. Teor. Fiz.,35, No. 6, 1538 (1958).
2. V. Gilinsky, Phys. Rev.,137, No. 1A, 50 (1965).
3. G. G. Vilenskaya, V. S. Imshennik, Yu. A. Medvedev, et al., Zh. Prikl. Mekh. Tekh. Fiz., No. 3, 18 (1975).
4. B. Ya. Arsenin, A. A. Dumova, et al., Zh. Vychisl. Mat. Mat. Fiz.,21, No. 2, 423 (1981).
5. A. V. Zhemerev and B. M. Stepanov, Gamma-Radiation Field from Neutron Source in Air [in Russian], Énergoizdat, Moscow (1987).