1. See e.g. Laermann, E., (1996) Nucl. Phys. A 610, 1c; Karsch, F., (1995) Nucl. Phys. A 590, 367c.
2. Blum, T., et al., (1995) Phys. Rev. D 51, 5153; I thank DeTar, C., for providing me with the figures shown here.
3. Bjorken, J.D., (1983) Phys. Rev. D 27, 140.
4. Matsui, T., and Satz, H., (1986) Phys. Lett. B 178, 416.
5. Bjorken, J.D., (1982) Energy loss of partons in a quark-gluon plasma, Fermilab Pub-82/59-THY, (unpublished).