1. R. J. Glauber:High-Energy Collision Theory, Lectures in Theoretical Physics, Boulder (1958), vol.1 (New York, 1959), p. 315.
2. L. D. Landau andE. M. Lifshitz:Quantum Mechanics (London, 1958), p. 399.
3. L. Van Hove:Theoretical Problems in Strong Interactions at High Energies, CERN Report 65-22 (1965), p. 87.
4. J. D. Jackson:Rev. Mod. Phys.,37, 484 (1965).
5. W. N. Cottingham andR. F. Peierls:Phys. Rev.,137, B 147 (1965).