1. W.J. Willis in Proceedings of the XVI International Conference on High Energy Physics, Chicago-Batavia, 111., USA, 1972, eds. J.D. Jackson and A. Roberts (NAL, Batavia, 111. 1973), Vol. 4, pp 321–331. Note particularly the suggestion attributed to G. Cocconi on page 323 that “new states of matter might be produced when hadrons could be concentrated at high densities for a sufficiently long time”.
2. Proceedings of the Sixth International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions-Quark Matter 1987, eds. H. Satz et a!., Z. Phys. C- Particles and Fields 38 (1988) 1; and previous proceedings in this series;
3. J.C. Collins and M.J. Perry, Phys. Rev. Lett. 34 (1975) 1353;
4. N. Cabibbo and G. Parisi, Phys. Lett. 59B (1975) 67.
5. R. Anishetty, P. Koehler and L. McLerran, Phys. Rev. D22 (1980) 2793.