1. Slansky R.: Phys. Rev. C11 (1974) 99;
2. Berger E. L.: Nucl. Phys. B86 (1975) 61;
3. Busza W.:in Proceedings of the VIth International Conference on High Energy Physics and Nuclear Structures, Santa Fe and Los Alamos, 1975;
4. Subramanium M.:in Proceedings of Seminar on Interaction of Elementary Particles with Nuclei, Santiniketan, March 1976;
5. Azimov S. A. et al.:in Proceedings of Meeting on Nuclear Production at High Energies, Terste, June 1976.