1. K. Fukatsu, K. Kato, and H. Tanaka, Prog. Theor. Phys. 81, 736 (1989); O. Portilho and S. A. Coon, Z. Phys. A 290, 93 (1979); H. Ogasawara and J. Hiura, Prog. Theor. Phys. 59, 655 (1978).
2. D. V. Fedorov and A. S. Jensen, Phys. Lett. B 389, 631 (1996).
3. I. N. Filikhin and S. L. Yakovlev, Yad. Fiz. 63, 409 (2000) [Phys. At. Nucl. 63, 343 (2000)].
4. S. P. Merkuriev and S. L. Yakovlev, Dokl. Akad. Nauk SSSR 262, 591 (1982); Teor. Mat. Fiz. 56, 60 (1983); S. P. Merkuriev and L. D. Faddeev, Quantum Scattering Theory for Few-Particle Systems (Nauka, Moscow, 1985).
5. S. L. Yakovlev and I. N. Filikhin, Yad. Fiz. 56(12), 98 (1993) [Phys. At. Nucl. 56, 1676 (1993)]; Yad. Fiz. 58, 817 (1995) [Phys. At. Nucl. 58, 754 (1995)].