1. P. K. F. Grieder, Extensive Air Showers: High Energy Phenomena and Astrophysical Aspects (Springer, Berlin, 2010).
2. A. V. Glushkov, V. M. Grigoriev, N. N. Efimov, M. I. Pravdin, O. S. Diminstein, and V. P. Sokurov, in Proceedings of the 16th ICRC, Kyoto, 1979, Ed. by S. Miyake and N. Gakujutsu Kaigi (Tokyo, 1979), p. 158.
3. A. V. Glushkov, Cand. Sci. Dissertation (Skobeltsyn Inst. Nucl. Phys., Moscow State Univ., Moscow, 1982).
4. A. V. Glushkov, L. G. Dedenko, N. N. Efimov, N. N. Efremov, I. T. Makarov, P. D. Petrov, and M. I. Pravdin, Izv. Akad. Nauk SSSR, Ser. Fiz. 55, 2166 (1986).
5. A. V. Glushkov, M. I. Pravdin, I. E. Sleptsov, V. R. Sleptsova, and N. N. Kalmykov, Phys. At. Nucl. 63, 1477 (2000).