1. V. A. Klimanov, S. A. Konovalov, V. A. Kochanov, et al., in: Propagation of Ionizing Radiations in Air [in Russian], V. I. Kukhtevich and V. P. Mashkovich (eds.), Atomizdat, Moscow (1979).
2. L. R. Kimel', Ya. N. Rastsvetalov, V. P. Sidorin, et al., ?Monte Carlo calculation of the spectral distributions of scattered neutron radiation from high-energy accelerators? [in Russian], Preprint R16-6182, Joint Institute for Nuclear Research, Dubna (1971).
3. T. Nakamura and T. Kosako, Nucl. Sci. Eng.,77, No. 2, 168 (1981).
4. M. Wells, A. Andrews, and R. French, ?SKYSHINE II prediction of nuclear facility farfield neutron and gamma-ray exposure,? in: Proceedings of Sixth International Conference on Radiation Shielding, Tokyo, May 16?20, 1983, Vol. II, JAERI (1983), pp. 1007?1016.
5. T. Nakamura and K. Hayashi, ?Neutron skyshine from proton cyclotron and electron synchrotron,? in: Proceedings of Sixth International Conference on Radiation Shielding, Tokyo, May 16?20, 1981, Vol. II, JAERI (1983), pp. 1017?1025.