1. D. V. Shirkov, V. V. Serebryakov, and V. A. Meshcheryakov, Dispersion Theories of Strong Interactions at Low Energy, North-Holland, Amsterdam (1969).
2. P. Collins and E. J. Squires, Regge Poles in Particle Physics [Russian translation], Mir, Moscow (1971).
3. A. M. Badalyan and Yu. A. Simonov, Fiz. Elem. Chastits At. Yadra,6, 299 (1975).
4. B. A. Girard and M. G. Fuda, Phys. Rev. C,19, 579, 583 (1979).
5. J. M. Greben and Yu. A. Simonov, Phys. Rev. C,18, 642 (1978).