1. See, for instance, J. Engels, K. Kajantie, L.D. Mc Lerran, L. Van Hove: In: Quark matter formation and heavy ion collisions. M. Jacob, H. Satz Eds. Singapore: World Scientific Publ. 1982; H. Satz: New States of Matter Bi-TP 82/29, talk given at International Conference on Nucleus-Nucleus Collisions; J. Cleymans, M. Dechantsreiter, F. Halzen, MAD/TH/50, May 1982
2. Y. Nambu and Bindu Bambah: Phys. Rev.D26, 2871 (1982); Y. Nambu, Bindu Bambah, M. Gross: Phys. Rev.26D, 2875 (1982); M. Gross: Phys. Rev.27D, 432 (1983)
3. J. Dias de Deus, M. Pimenta: Phys. Lett.109B, 89 (1982)