1. B. Müller, The Physics of the Quark-Gluon Plasma, Lecture Notes in Physics, Vol. 225 (Springer-Verlag, Berlin-Heidelberg 1985).
2. L. McLerran, Rev. Mod. Phys. 58, 1021 (1986).
3. Quark-Gluon Plasma, edited by R. C. Hwa (World Scientific, Singapore, 1991)
4. For a recent review of cosmological implications of the quark-gluon phase transition, see: K. A. Olive, Science 251, 1194 (1991) and references therein.
5. See e.g.: E. W. Kolb and M. S. Turner, The Early Universe (Addison-Wesley, Redwood City, 1990), Chap. 3.5.