1. L. D. Faddeev, Mathematical Aspects of the Three-Body Problem of the Quantum Scattering Theory (Daniel Davey and Co., Jerusalem, 1965), p. 114.
2. S. P. Merkur’ev and L. D. Faddeev, Quantum Scattering Theory for Several Particle Systems (Kluwer, Dordrecht, 1993; Nauka, Moscow, 1985).
3. S. P. Merkur’ev, Sov. J. Nucl. Phys. 24, 150 (1976).
4. S. P. Merkur’ev, Sov. J. Theor. Math. Phys. 32, 680 (1977).
5. I. Bray and A. T. Stelbovics, Phys. Rev. Lett. 69, 53 (1992).