1. N. S. Zelenskaya et al., Yad. Fiz. 64, 1995 (2001) [Phys. At. Nucl. 64, 1909 (2001)].
2. V. M. Lebedev, N. V. Orlova, and A. V. Spassky, Yad. Fiz. 61, 1604 (1998) [Phys. At. Nucl. 61, 1493 (1998)].
3. N. S. Zelenskaya et al., Yad. Fiz. 13, 734 (1971) [Sov. J. Nucl. Phys. 13, 417 (1971)].
4. M. S. Al’vesh et al., Yad. Fiz. 27, 1431 (1978) [Sov. J. Nucl. Phys. 27, 755 (1978)].
5. L. I. Galanina et al., Vestn. Mosk. Univ., Ser. 3: Fiz., Astron., No. 4, 24 (2004).