1. Audouze, J., Lindley, D. and Silk, J., (1985): ApJ (letters) 293, L53
2. Audouze, J., (1993): in Origin and Evolution of the Elements, eds. N. Prantzos, E.Vangioni-Flam and M.Cassé, Cambridge U. Press, pp. 1
3. Balser, D.S., Bania, T.M., Brockway, C.J., Rood, R.T. and Wilson, T.L., (1994): ApJ. in press
4. Boesgaard, A.M. and Steigman, G., (1985): Ann. Rev. Astron. Astroph., 23, 319
5. Carswell, R.F., Rauch, M., Weymann, R.J., Cook, A.J. and Webb, J.K., (1994): MN-RAS, 268, Ll