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2. K. Gottfried:Proceedings of the V International Conference on High-Energy Physics and Nuclear Structure (1974), p. 79.
3. P. M. Fishbane andJ. S. Trefil:Phys. Lett.,51 B, 139 (1974).
4. Yu. M. Shabelsky: Leningrad Institute of Nuclear Physics, preprint No. 248, Gatchina (1976).
5. A. Capella andA. B. Kaidalov:Nucl. Phys.,111 B, 477 (1976).