1. Schramm, D. N. in Origin and Evolution of the Elements (eds Prantzos, N., Vangioni-Flam, E. & Cassé, M.) 112–131 (Cambridge Univ. Press, 1993).
2. Geiss, J. in Origin and Evolution of the Elements (eds Prantzos, N., Vangioni-Flam, E. & Cassé, M.) 89–106 (Cambridge Univ. Press, 1993).
3. Linsky, J. L. et al. Astrophys. J. 402, 694–709 (1993).
4. Linsky, J. L. et al. Astrophys. J. 451, 335–351 (1995).
5. Linsky, J. L. & Wood, B. E. Astrophys. J. (in the press).