1. M. Goldberger and K. Watson, Collision Theory (Wiley, New York, 1964), Chap. 11.
2. R. Jastrov, Phys. Rev. 82, 261 (1951).
3. R. J. Glauber, Phys. Rev. 100, 242 (1955).
4. R. J. Glauber, in Lectures in Theoretical Physics, Ed. by W. E. Brittin and L. Dunham (Interscience, New York, 1959), Vol. 1, p. 315.
5. L. D. Landau and E. M. Lifshitz, Quantum Mechanics. Nonrelativistic Theory (Nauka, Moscow, 1989; Pergamon, Oxford, 1982), Sect. 125, 152.