1. Proceedings of the XVII International Conference on High Energy Physics, London 1974;
2. Study of neutral-charged particle correlations in high energy collisions
3. Proceedings of the XVIII International Conference on High Energy Physics, Tbilissi 1976.
4. For a review of the present status see e.g.
5. Proceedings of the V-th International Colloquium on Many Particle Hydrodynamics, Leipzig 1974;