1. Sh. Abduzhamilov, S. A. Azimov, N. Sh. Saidkhanov, and V. M. Chudakov, Sov. J. Nucl. Phys. 15, 169 (1972).
2. S. A. Azimov, Yu. P. Kratenko, N. Sh. Saidkhanov, and V. M. Chudakov, Izv. Vyssh. Uchebn. Zaved., Ser. Fiz. 1, 120 (1977).
3. N. V. Smirnov and I. V. Dunin-Barkovskii, A Course in Probability Theory and Mathematical Statistics for Engineering Applications (Fizmatgiz, Moscow, 1959), p. 187 [in Russian].
4. EMU-01 Collab. (M. I. Adamovich et al.), Phys. Lett. B 352, 472 (1995).
5. EMU-01 Collab. (M. I. Adamovich et al.), Eur. Phys. J. A 2, 61 (1998).