1. G. B. Khristiansen, G. V. Kulikov, and Y. A. Fomin, Ultra-High-Energy Cosmic Radiation (Atomizdat, Moscow, 1975) [in Russian].
2. S. V. Borisov, S. A. Voronov, A. V. Karelin, S. A. Koldobsky, and M. F. Runtso, “Determining the parameters of a particle shower initiated in an positionsensitive calorimeter by electrons and protons,” Phys. Part. Nucl. Lett. 7, 68–77 (2010).
3. D. Heck and T. Peirog, Extensive Air Shower Simulations at the Highest Energies, A User’s Guide (Inst. Kernphysik, Germany, 2013).
4. J. Knapp et al., “Extensive air shower simulations at the highest energies,” Astropart. Phys. 19, 77–99 (2003).
5. L. Alexandrov, S. Cht. Mavrodiev, and A. Mishev, “Estimation of the primary cosmic radiation characteristics,” in Proceedings of the 27th International Cosmic Ray Conference ICRC, Hamburg, August 8–15, 2001, pp. 257–260.