1. F. G. Lepekhin and B. B. Simonov, Yad. Fiz. 68, 2101 (2005) [Phys. At. Nucl. 68, 2039 (2005)].
2. J. Hufner, Phys. Rep. 125, 129 (1985).
3. F. G. Lepekhin, D. M. Seliverstov, and B. B. Simonov, Eur. Phys. J. A 1, 137 (1998).
4. F. G. Lepekhin, Preprint No. 2662, PIYaF (Petersburg Nuclear Physics Institute, Gatchina, 2006), p. 11.
5. http://hepd.pnpi.spb.ru/ofve/nni/b11pre.htm .